cal 90 to 20 which are numbers 291 opened at random from the book find the probability that it will be a two digit number,a perfect square no,a no. divisible
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Answer:
Number of perfect square from 1 to 90 are 1,4,9,16,25,36,49,64,81.
Total cases =90
Favorable cases =9
Therefore, probability =
90
9
=
10
1
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