Question

If cards are numbered from 7 to 40 find the probability of getting numbers duvisible by 7

Answer 1

Answer:

5 / 34

Step-by-step explanation:

As the numbers are from 7 to 40,

n(S) = {7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40}

n(S)= 40 - 7 +1 = 34.

Let A be the event of getting a number divisible by 7.

n(A)= {7,14,21,28,35} = 5

∴P(A) = n(A) / n(S)

         = 5 / 34