What is
cos²(45° + θ) + cos²(45° – θ)
———————————————————————
tan(60° + θ) · tan(60° – θ)  equal to?

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…