Question

What is the probability that a number selected at random from the numbers 3, 4, 5, ....9 is a multiple of 4?

Answer 1

SOLUTION :  

Given : Numbers are from 3 to 9

Total Numbers = 9 - 3 + 1 = 7 (both 3 & 9 included)

Total number of outcomes = 7

Let E = Event of getting a multiple of 4

Numbers which are a multiple of 4 are : 4 , 8  

Number of outcome favourable to E = 2

Probability (E) = Number of favourable outcomes / Total number of outcomes

P(E) = 2/7  

Hence, the required probability of getting a multiple of 4,  P(E) = 2/7

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Answer 2

No of outcomes = 2
Total no. of outcomes = 7
Probability of getting multiple of 4 = 2/7

Thus answer is 2/7

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