The position vectors of three points A, B and C are →a, →b and →c respectively, where →c = (cos²θ)→a + (sin²θ)→b. What is (→a × →b) + (→b × →c) + (→c × →a) equal to?

What is the arithmetic mean of 8², 9², 10², …, 15²?

Let X be a random variable following binomial distribution whose mean and variance are 200…

The probability of a man hitting a target is 1/5. If the man fires 7…

If two fair dice are tossed, then what is the probability that the sum of…

If P(A) = 1/3, P(B) = 1/2 and P(A ∩ B) = 1/4, then what…