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1) A worker's daily salary varies each day.In one week, he worked five days & his daily salaries were $40.65,$45.25,$43.70,$41.85 & $42.95.What was his average salary of that week?A) 42.88 B) 42.78 C) 41.98 D) 41.88
2) Average of 10 no is 20, average of 6 nos in this is 25, what is the average of remaining 4 nos? A) 12.75 B) 12.65 C) 12.5 D) Data Inadequate
Answer & Explanation
Answer: 12.5 (Total Sum of remaining 4 = (10*20) - (6*25) =50.Average of remaining 4 = 50/4=12.5)
3) Three years ago, the average age of a family of 6 members is 20.A baby have been born, the average age of the family is the same today. What is the age of the babyA) 2.5 years B) 3 years C) 1.5 years D) 2 years
Answer & Explanation
Answer: 2 years (Total age of 6 members 3 years ago = 120.
Total age of 6 members now = 120 + 18 = 138
Total age of 7 members today = 140. Age of the baby is 2 years)
4) The captain of a football team of 11 members is 24 years old and the goal keeper is 26 years older. If the ages of these two are excluded, the average age of the rest of the players is one year less than the average age of the whole team. What is the average age of the team?A) 20.5 years B) 21 years C) 22 years D) 19.5 years
Answer & Explanation
Answer: 20.5 years (Let the average age of the whole team be x years.
11x - (24 + 26) = 9(x -1)
11x - 9x = 41
x = 20.5 years
.So, average age of the team is 20.5 years.)
5) A team of 7 persons join a shooting competition.The best marksman scored 88 points.If he had scored 94 points, the team's average would have been 82.What's the actual average of the team?A) 81.24 B) 81.14 C) 82.55 D) 82.53
Answer & Explanation
Answer: 81.14 (Let x be the total score.
(x+94-88)/7 =82
x =568 points
Actual average = 568/7 =81.14)
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