Question

Cards each marked with one of the numbers 4, 5, 6, ..., 20 are placed in a box and mixed thoroughly. One card is drawn at random from the box. What is the probability of getting an even number?

Answer 1

SOLUTION :  

Given : Cards are marked with numbers 4, 5, 6, 7……..20

Total number of outcomes = 20 - 4 +1 = 17 (both 4 & 20 included)

Total number of outcomes = 17

Let E = Event of getting an Even number

Cards marked with even numbers are = 4,6,8,10,12,14,16,18,20

Number of outcome favourable to E = 9

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

P(E) = 9/17

Hence, the probability of getting an Even number ,  P(E) = 9/17 .

HOPE THIS ANSWER WILL HELP YOU ...

Answer 2

The favourable outcomes are - 4,6,8,10,12,14,16,18,20.

The total outcome are = 17

So, probability is 9/17.

Happy to answer you.

@M.S.V.