Question

A bag contains 30 counter nombered 1 to 30 one counter is drawn at random find the probability that the nomber on the counter is multiple of 5 or7

Answer 1

Answer:

1 / 3

Step-by-step explanation:

The numbers from 1 to 30 that are multiples of 5 are:

5, 10, 15, 20, 25, 30

The numbers that are multiples of 7 are:

7, 14, 21, 28

So a number is a "multiple of 5 or 7" means that it is one of the numbers:

5, 7, 10, 14, 15, 20, 21, 25, 28, 30

There are 10 numbers here.

Now

P(number on counter is multiple of 5 or 7)

= ( # ways of getting a multiple of 5 or 7 ) / ( # ways of getting a counter )

= 10 / 30

= 1 / 3

Answer 2

The probability is 1/3