Question
If 2 pens are drawn at random what is the probability
that none of them is blue? A basket contains 3 blue, 5black and 3 red pens.Solution
Let S be the sample space. Then, N(S) = number of ways of drawing 2 pens out of 11 = ¹¹C₂ = (11 ×10 )/(2 ×1) = 55 Let E = event of getting none of them is blue. n(E) = ⁸C₂ = (8 ×7 )/(2 ×1) = 28 n(P) = (n(E))/(n(S)) = 28/55
At 2'0 clock, the hands of a clock make an acute angle and a reflex angle. How much is the reflex angle (in degrees)?
Find the cube of 373.
How many times are the hour and the minute hands of a clock at a right angle in a period of two days?
A clock gets fast by 15 minutes every day. If, on a certain day, the clock shows correct time at 12 in the noon, what time will the clock show at 4:00 ...