Question

A boxcontains 90 discs which are numbered from 1 to 90. If one discs is drawn at random from the box find the probability that is bare first a two digit number second a perfect square number 3rd a number divisible by 5

Answer 1

Answer:

Step-by-step explanation:

1st 2 digit number

Total 2 digit numbers before 90 include 10 to 89 thus that is 81 numbers in total so probability of 2 digit number 81/90

= 9/10

2nd perfect square

There are 8 perfect squares between 1 and 90

So prabibilty of perfect square = 8/90

= 4/45

3rd there are total qu numbers divisible by 5 between 1 and 90

So probability of a number divisible by 5 = 17/90

There you GO!!