A box contains 40 identical balls of which 10 are re...
A box contains 40 identical balls of which 10 are red and 12 are blue. if a ball is selected at random from the box what is the probability that it is neither red nor blue?
920
310
14
1120
Correct answer is A
Total number = 40
number of red = 10
Pr (R) = 1040
Pr(blue) = 1240
probability (neither red nor blue)
= 1 - 1040 - 1240
= 40−12−1040
= 1840 or 920
In the diagram above, ML//PQ and NP//QR, if ∠LMN = 40° and ∠MNP = 55°. Find &an...
The expression x3 - 4x2 + cx + d is such that x + 1 is its factor, and its value is 1...
Make x the subject of the formula:y = 3x−9c4x+5d...
If cos x = 4/5, 0° ≤ x ≤ 90°, find the value of (1 + tan x)/(1 - tan x)...