Question
A bag contains red, blue, and green balls in the ratio
of 2:4:5. If two balls are randomly selected from the bag, the probability that both are blue is 1/8 . Determine the total number of balls in the bag.Solution
Let the number of red, blue and green balls in the bag are 2x, 4x and 5x respectively. Total number of balls in the bag = 2x + 4x + 5x = 11x So according to question: 4xC2/11xC2 = 1/8 4x (4x – 1)/ 11x (11x – 1) = 1/8 (16x – 4)/ (121x – 11) = 1/8 128x – 32 = 121x – 11 7x = 21, x = 3 So the total number of balls in the bag = 33
Which of the following is the first sentence after rearrangement of the given paragraph?
Which should be the second sentence after rearrangement?
In Each question below has a sentence with five highlighted words that are jumbled. You need to rearrange them in the correct order to make a coherent s...
Which of the following should be the SECOND sentence after the rearrangement?
1. I had remembered it.
P. Initially after the Liberation I was absolutely not interested in all that stored stuff, and naturally I was also r...
In each question below, a sentence is given with an idiom/phrase printed in bold type. That part may contain a grammatical error. Each sentence is follo...
In the questions given below, a sentence has been divided into four fragments (A), (B), (C) and (D) and is arranged (not necessarily in the correct ord...
In India, the latter ceremony developed (A) its origins to the early 1950s when Major Roberts of the Indian Army traces (B) a unique ...
The most longer (A) element of the Court’s judgment was its proposition (B) that caste, and the ___________ (C) to right historical wrongs, is no cont...
Water and steam(P)/ It used(Q)/to mechanise production(R)/ power(S).
