Lakshya Education MCQs

Question: There are 30 students in a class. The average age of first 10 students is 12.5 years. The average age of the remaining 20 students is 13.1 years. The average age (in years) of the students of the whole class is :
Options:
A.12.5 years
B.12.7 years
C.12.8 years
D.12.9 years
Answer: Option D

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Question 1. The average of marks in Mathematics for 5 students was found to do 50. Later, it was discovered that in the case of one student the marks 48 were misread as 84. The correct average is :
  1.    40.2
  2.    40.8
  3.    42.8
  4.    48.2
Answer: Option C
Question 2. The average marks obtained by a class of 60 students is 65. The average marks of half of the students is found to be 85. The average marks of the remaining students is :
  1.    35
  2.    45
  3.    55
  4.    65
Answer: Option B
Question 3. In the first 10 overs of a cricket game, the run rate was only 3.2. The run rate in the remaining 40 overs to reach the target of 282 run is :
  1.    6.4
  2.    6.3
  3.    6.25
  4.    6.5
Answer: Option C
Question 4. A cricketer had a certain average of runs for his 64 innings. In his 65th innings, he is bowled out for no score on his part. This brings down his average by 2 runs. His new average of runs is :
  1.    130
  2.    128
  3.    70
  4.    68
Answer: Option B
Question 5. What is the average of the first six (positive) odd number each of which is divisible by 7?
  1.    42
  2.    43
  3.    47
  4.    49
Answer: Option A
Question 6. A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If he had scored 92 points, the average score for the team would have been 84. The number of points the team scored was :
  1.    672
  2.    665
  3.    645
  4.    588
Answer: Option B

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