{"id":522,"date":"2021-04-08T10:00:19","date_gmt":"2021-04-08T04:30:19","guid":{"rendered":"https:\/\/wordpress-505192-1602719.cloudwaysapps.com\/?p=522"},"modified":"2021-04-08T11:00:38","modified_gmt":"2021-04-08T05:30:38","slug":"samacheer-kalvi-9th-maths-chapter-9-ex-9-1","status":"publish","type":"post","link":"https:\/\/samacheerkalviguru.com\/samacheer-kalvi-9th-maths-chapter-9-ex-9-1\/","title":{"rendered":"Samacheer Kalvi 9th Maths Solutions Chapter 9 Probability Ex 9.1"},"content":{"rendered":"

You can Download Samacheer Kalvi 9th Maths Book Solutions<\/a> Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations.<\/p>\n

Tamilnadu Samacheer Kalvi 9th Maths Solutions Chapter 9 Probability Ex 9.1<\/h2>\n

9th Maths Exercise 9.1 Question 1.<\/strong>
\nYou are walking along a street. If you just choose a stranger crossing you, what is the probability that his next birthday will fall on a Sunday?
\nSolution:
\nDays in a week (S) = {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}
\nn( S) = 7
\n\u2234 No. of days in week = 7
\nEvent of selecting Sunday (A) = {Sunday}
\nn(A) = 1
\n\u2234 Probability of selecting Sunday = \\(\\frac{n(\\mathrm{A})}{n(\\mathrm{S})}=\\frac{1}{7}\\)<\/p>\n

9th Class Maths Exercise 9.1 Solution Question 2.<\/strong>
\nWhat is the probability of drawing a King or a Queen or a Jack from a deck of cards?
\nSolution:
\nNumber of cards n(S) = 52
\nNo. of King cards n(A) = 4
\nNo. of Queen cards n(B) = 4
\nNo. of Jack cards n(C) = 4
\nProbability of drawing a King card
\n\\(=\\quad \\frac{n(\\mathrm{A})}{n(\\mathrm{S})}=\\frac{4}{52}\\)
\nProbability of drawing a Queen card
\n\\(=\\frac{n(\\mathrm{B})}{n(\\mathrm{S})}=\\frac{4}{52}\\)
\nProbability of drawing a Jack card
\n\\(=\\frac{n(\\mathrm{C})}{n(\\mathrm{S})}=\\frac{4}{52}\\)
\nThe Probability of drawing a King or a Queen or a Jack from a deck of cards
\n\\(=\\mathrm{P}(\\mathrm{A})+\\mathrm{P}(\\mathrm{B})+\\mathrm{P}(\\mathrm{C})=\\frac{4}{52}+\\frac{4}{52}+\\frac{4}{52}=\\frac{4+4+4}{52}=\\frac{12}{52}=\\frac{3}{13}\\)<\/p>\n

9th Class Math 9.1 Exercise Solution Question 3.<\/strong>
\nWhat is the probability of throwing an even number with a single standard dice of six faces?
\nSolution:
\nFaces of a dice (S) = {1, 2, 3, 4, 5, 6}
\nn(S) = 6
\nEvent of throwing an even number
\nA = {2, 4, 6}, n(A) = 3
\n\"9th<\/p>\n

Samacheer Kalvi 9th Maths Guide Question 4.<\/strong>
\nThere are 24 balls in a pot. If 3 of them are Red, 5 of them are Blue and the remaining are Green then, what is the probability of picking out
\n(i) a Blue ball,
\n(ii) a Red ball and
\n(iii) a Green ball?
\nSolution:
\nn(S) = 24
\nRed – n(R) = 3
\nBlue – n(B) = 5
\nGreen – n(G) = 16
\n\"9th<\/p>\n

9th Maths 9.1 Question 5.<\/strong>
\nWhen two coins are tossed, what is the probability that two heads are obtained?
\nSolution:
\nSample space when two coins are tossed (S) = {HH, TT, HT, TH}
\nn(S) = 4
\nEvent of getting two heads (A) = {HH}
\nn(A) = 1
\nProbability of getting two heads P(A) = \\(\\frac{n(\\mathrm{A})}{n(\\mathrm{S})}=\\frac{1}{4}\\)<\/p>\n

Class 9 Maths Ex 9.1 Solutions Question 6.<\/strong>
\nTwo dice are rolled, find the probability that the sum is
\n(i) equal to 1
\n(ii) equal to 4
\n(iii) less than 13
\nSolution:
\nWhen two dice are rolled Sample space
\n\"9th
\n\"Samacheer<\/p>\n

9th Maths Exercise 9.1 Samacheer Kalvi Question 7.<\/strong>
\nA manufacturer tested 7000 LED lights at random and found that 25 of them were defective. If a LED light is selected at random, what is the probability that the selected LED light is a defective one.
\nSolution:
\nn(S) = 7000 S – Total no. of lights.
\nn(A) = 25 A – Defective ones.
\n\"9th<\/p>\n

Samacheer Kalvi 9th Maths Question 8.<\/strong>
\nIn a football match, a goalkeeper of a team can stop the goal, 32 times out of 40 attempts tried by a team. Find the probability that the opponent team can convert the attempt into a goal.
\nSolution:
\nTotal no. of attempts n(S) = 40
\nTotal no. of attempts by A team n(A) = 32
\nTotal no. of attempts by the opponent team B = n(B) = 40 – 32 = 8
\n\"Class<\/p>\n

9 Maths Samacheer Kalvi Question 9.<\/strong>
\nWhat is the probability that the spinner will not land on a multiple of 3?
\nSolution:
\nTotal no. of choices n(S) = 8
\nTotal no. of multiples of 3 A = {3, 6}
\nn(A) = 2
\nEvent of non-multiples of 3B = {1, 2, 4, 5, 7, 8}
\nn(B) = 6
\n\"9th<\/p>\n

Class 9th Maths Chapter 9 Exercise 9.1 Question 10.<\/strong>
\nFrame two problems in calculating probability, based on the spinner shown here.
\n\"Samacheer
\nSolution:
\n(i) What is the probability that the spinner will land on an even number?
\n(ii) What is the probability that the spinner will not land on a prime number.<\/p>\n","protected":false},"excerpt":{"rendered":"

You can Download Samacheer Kalvi 9th Maths Book Solutions Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations. Tamilnadu Samacheer Kalvi 9th Maths Solutions Chapter 9 Probability Ex 9.1 9th Maths Exercise 9.1 Question 1. You are walking along a street. If you just choose …<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":""},"categories":[3],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/posts\/522"}],"collection":[{"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/comments?post=522"}],"version-history":[{"count":0,"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/posts\/522\/revisions"}],"wp:attachment":[{"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/media?parent=522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/categories?post=522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/samacheerkalviguru.com\/wp-json\/wp\/v2\/tags?post=522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}