HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Important Questions for Mathematics and Statistics

It is observed that it rains on 12 days out of 30 days. Find the probability that it it will rain at least 2 days of a given week.

Given that X ~ B(n = 10, p), E(X) = 8, then value of p = ______

A r.v. X ~ B(n, p). If the values of mean and variance of X are 18 and 12 respectively, then find total number of positive values of X.

Let the p.m.f. of r.v. X be P(x) = `""^4"C"_x (5/9)^x (4/9)^(4 - x)`, x = 0, 1, 2, 3, 4. Find E(X) and Var(X)