Question

a box contains 90 discs which are numbered from 1 to 90 .if one disc is drawn in random from the box find the probability that it bear ..two digit number
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Answer 1

Answer:

9/10

Step-by-step explanation:

the probability of getting a two digit number

{1,2,3,4,5,6,7,8,9}

n=9

probability of getting a two digit number=1-9/90

=1-1/10

=10-1/10

=9/10