A bag contains tickets, numbered 11, 12, 13, ...., 30. A ticket is taken out from the bag at random. Find the probability that the number on the drawn ticket is a multiple of 7 *
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Step-by-step explanation:
Given : Tickets marked with numbers from 11 to 30
Total number of outcomes = 20
(i) Let E1 = Event of getting a multiple of 7
Numbers which is multiple of 7 are = 7,14,21,28
Number of outcome favourable to E1 = 4
Probability (E1) = Number of favourable outcomes / Total number of outcomes
P(E1) = 4/20 = 1/5
Hence, the required probability of getting a number which is multiple of 7 , P(E1) = 1/5 .
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