Most aspirants are unlikely to disagree with the fact that it’s quantitative ability that is pivotal in most of the competitive examinations. In recent times it has got more prominence considering the fact that the cut-off has grown exponentially and it’s Mathematics that can help you secure the maximum marks provided correct approach and strategies are applied.
We make our best efforts to analyze and segregate those questions which are either based on new patterns or frequently repeated in last few years. Sincere efforts are required to be made to make sure these sums are solved within stipulated time because time management plays vital role in any exam particularly in Banking exams. There is prominent evidence to suggest that only precise strategies together with practicing relevant sums can help you break the cut-off barrier.
In other words, it’s not only how you solve but what you solve too can be deciding factor, that’s why we have attached some of the most prominent questions of PROBABILITY AND PERMUTATION AND COMBINATION . Feel free to clarify, if you have any query, your inputs are always welcome.
DIRECTIONS (Qs. 1-5) : Study the given information carefully
and answer the questions that follow :
An urn contains 6 red, 4 blue, 2 green and 3 yellow marbles.
that at least one is blue?
(a) 4/15
(b)69/91
(c)11/15
(d)22/91
(e) None of these
2. If two marbles are picked at random, what is the probability
that both are red?
(a)1/6
(b)1/3
(c)2/15
(d)2/5
(e) None of these
3. If three marbles are picked at random, what is the probability
that two are blue and one is yellow?
(a)3/31
(b)1/5
(c)18/455
(d)7/15
(e) None of these
4. If four marbles are picked at random, what is the probability
that one is green, two are blue and one is red?
(a)24/455
(b)13/35
(c)11/15
(d)1/3
(e) None of these
5. If two marbles are picked at random, what is the probability
that either both are green or both are yellow?
(a)5/91
(b)1/35
(c)1/3
(d)4/105
(e) None of these
DIRECTIONS (Qs. 6-8) : Study the given information carefully
and answer the questions that follow :
A basket contains 4 red, 5 blue and 3 green marbles.
6.If three marbles are picked at random, what is the probability
that either all are green or all are red ?
(a)7/44
(b)7/12
(c)5/12
(d)1/44
(e) None of these
7. If two marbles are picked at random, What is the probability
that both are red ?
(a)3/7
(b)1/2
(c)2/11
(d)1/6
(e) None of these
8. If three marbles are picked at random, What is the probability
that at least one is blue ?
(a)7/12
(b)37/44
(c)5/12
(d)7/44
(e) None of these
DIRECTIONS (Qs. 9-10) : Study the given information carefully
and answer the questions that follow :
A committee of five members is to be formed out of 3 trainees,
4 professors and 6 research associates. In how many different
ways can this be done if :
9. The committee should have all 4 professors and 1 research
associate or all 3 trainees and 2 professors ?
(a) 12
(b) 13
(c) 24
(d) 52
(e) None of these
10. The committee should have 2 trainees and 3 research
associates?
(a) 15
(b) 45
(c) 60
(d) 9
(e) None of these
Answer
1B
2C
3C
4A
5D
6D
7C
8B
9A
10C
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