Two circles are drawn with the same centre. The circumference of the smaller circle is 44 cm and that of the bigger circle is double the smaller one. What is the area between these two circles?

If A and B are two events such that P(A) = 3/4 and P(B) =…

If the mode of the scores 10, 12, 13, 15, 15, 13, 12, 10, x…

In a binomial distribution, the mean is 2 and variance is 5/9. What is the…

A coin is tossed twice. If E and F denote occurrence of head on first…

The average of a set of 15 observations is recorded, but later it is found…