From a box containing 2 red, 6 white and 5 black balls, a...
From a box containing 2 red, 6 white and 5 black balls, a ball is randomly selected. What is the probability that the selected ball is black?
2/13
5/13
5/11
5/6
11/13
Correct answer is B
2r, 6w, 5b balls Total balls = 2 + 6 + 5 = 13 balls p(black) = 5/13
If the operation * on the set of integers is defined by P * Q = √PQ, find the va...
The mean of 2 - t, 4 + t, 3 - 2t, 2 + t and t - 1 is...
If N varies directly as M and N = 8 when M = 20 find M when N = 7 ...
In diagram above, QR//TU, < PQR = 80° and < PSU = 95°. Calculate < SUT. ...