Question

20 tickets, on which numbers 1 to 20 are written, are mixed thoroughly and then a ticket
is drawn at random out of them. Find the probability that the number on the drawn ticket
is a multiple of 2 or 4.

Answer 1

Here is your answer :

From 1 to 20 ,

Totally 10 numbers are the multiples of 2.

Which are 2, 4, 6, 8, 10, 12, 14, 16, 18 and 20.

From 1 to 20,

Totally 5 numbers are the multiple of 4.

Which are 4, 8, 12, 16, and 20.

Probability of an event P(E) :

Number of trials in which the event happened

Number of trials in which the event happened Total number of trials

Probability of getting multiple of 2 :

10

20

= 1/2 or 0.5

Probability of getting multiple of 4 :

5

20

= 1/4 or 0.25

Hope it helps ✌️