TCS Papers: Sample Questions 116  118 of 502
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Question number: 116
» Aptitude
Write in Short
Find the next term of the following series:
0,6, 24,60,120, ________
Explanation
First term of the series is 0, i. e.
Second term of the series is 6, i. e.
Third term of the series is 24, i. e.
Fourth term of the series is 60, i. e.
Fifth term of the series is 120, i. e.
Looking at the analogy, we can find the next term.
It will be
Question number: 117
» Aptitude
Question
100 students appeared for two examinations. 60 passed the first, 50 passed the second and 30 passed both. Find the probability that a student selected at random has failed in both the examinations?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Answer
a.Explanation
 We know that,
 Let A be number of students who passed in first exam.
 Let B be number of students who passed in second exam.
 We are asked to find the probability of student who failed in both the examinations.
 So 80 passed in at least one of the exams.
 So, 100  80 = 20 students are there who failed in both exams.
 Probability of student who failed in both the exams
Question number: 118
» Aptitude
Write in Short
A is 20 percent more efficient than B. If two persons can complete a piece of work in 60 days then in how many days A working alone can complete the work?
Explanation
A is 20 % more efficient than B.
Ratio of time taken by A and B is .
If B can do work in 6x days then A can do the same amount of work in 5x days.
So,
A can complete the work in 5x days, i. e. days.