Question

A box contains cards numbered from 1 to 20. A card is drawn at random from the box. Find the
probability that number on the drawn card is a composite number.
a)11/20
b)13/20
c)3/5
d)1/2
​

Answer 1

Answer:

c) 3/5

Step-by-step explanation:

The Prime numbers from 1 to 20 are_

2, 3, 5, 7, 11, 13, 17, 19.

So, there are 8 prime numbers and remaining numbers are composite i.e. 12 number cards are composite.

Therefore,

Pribability=possible outcome/total outcome

=12/20

=3/5

Hope this helps !!

Thanks !!