Question
A bag contains 20 balls. 8 balls are green, 7 are white
and 5 are red. What is the minimum number of balls that must be picked up from the bag (without replacing any of it) so that at least one ball from each color is drawn?ÂSolution
A bag contains 20 balls Calculation: ⇒ We have to at least one ball of each colour ⇒ Even if we pick 8 balls there is a probability all of them may be green. Hence we must pick more than 8 balls for sure ⇒ Now even we pick (8 + 7) balls or 15 balls, there is a probability that all of them may be green and white only with no red ball picked at all. ⇒ Hence taking the worst possible scenario in consideration we must pick = 15 + 1 = 16 ∴ The required result will be 16.
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...
Given below are six sentences 4 of which are jumbled. The first and the last sentence are given. Pick the option that gives the logically correct order...
Area under cotton cultivation in Tamil Nadu(P)Â Â Â Â Â Â Â as farmers harvesting cotton now (Q)Â Â Â Â Â Â Â is likely to fall next sowing season(R)...
Given below are four jumbled sentences. Pick the option that gives their correct order.
A: One day when the quarreling had been much more viol...
Given below are six sentences 4 of which are jumbled. The first and the last sentence are given. Pick the option that gives the logically correct order...
Each question is divided into four parts a,b,c,d. In some questions they are not in the sequence so according to grammar and context re- arrangement is...
Below are given a few sentences with their parts jumbled in a random order. Below the sentences are given possible rearrangements of the parts. You nee...
1. The reason why the courtrooms in India
P. that Indians are litigious
Q. faith in the judiciary than in the
R. are clogged with p...
1. He could have introduced
P. human rights and corrected
Q. more reforms, expanded
R. government, which contributed to
S. t...
in Hindi, each card features a common Indian bird species (A)/ about its behaviour and range on the other (B)/with photographs on one side and informati...