1.

One is asked to say a two digit number. What is the probability of being the number not a perfect square?

Answer»

Total number of two digit number : 90 

Total number of two digit perfect squares: 6

Number of two digit numbers which are not perfeet squares : 90 – 6 = 84,

Probability = \(\frac{84}{90}=\frac{42}{45}\)



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