TCS Papers: Sample Questions 96 - 97 of 502

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Question number: 96

» Aptitude

Short Answer Question▾

Write in Short

A class of 25 students took a science test. 10 students had an average (arithmetic mean) score of 80. The other students had an average score of 60. What is the average score of the whole class?

Explanation

  • There are total 25 students who took science test. Among them 10 students had an average of 80 while other students had an average of 60.
  • We are asked to find the average of whole class of 25 students.
  • Total score of 10 students =
  • Total score of 15 students =
  • So, total score of 25 students =
  • Average score of 25 students

  • Average score of whole class is 68.

Question number: 97

» Aptitude

MCQ▾

Question

The value of a scooter depreciates in such a way that its value of the end of each year is 3/4 of its value of the beginning of the same year. If the initial value of the scooter is Rs. 40,000, what is the value at the end of 3 years?

Choices

Choice (4) Response

a.

Rs. 13435

b.

Rs. 16875

c.

Rs. 23125

d.

Rs. 19000

Answer

b.

Explanation

  • Cost price of scooter is Rs. 40,000/-
  • At the end of a year it’s price has been reduced to of its initial value.
  • So, after one year its price will be, Rs.
  • Same way, again after second year it’s price will be of its beginning price.
  • So, after second year it’s price will be, Rs.
  • Same way, again after third year it’s price will be of its beginning price.
  • So, after third year it’s price will be, Rs.