MCQ: The average weight of a group of 30 friends increases by 1 kg when the weight of their football coach was added. If average weight of the group after including the weight of the football coach is 31 kg, then
1) what is the weight of their football coach ?
A.59kg B. 60 kg C. 61 kg D. 62 kg
2) If after rigorous training each player loses 2kg of weight, then what will be the average weight of these 31 people?
A. 29.00kg B. 29.02kg C. 29.04kg D.29.06kg
3) If a new weighing scale is used, which is faulty and shows 5kg more than the actual weight, then what will be the difference between the new average weight and the actual average weight of the group of 31 people?
A.0kg B. 5kg C. 36kg D. 155kg
4) If a new weighing scale is used, which is faulty and shows 2kg less than the actual weight, then what will be the difference between the new modal weight and the actual modal weight of the group of 31 people?
A.0kg B. 2kg C. 2.5kg D. 29kg
5) If a new weighing scale is used, which is faulty and shows 4kg more than the actual weight, then what will be the difference between the new median weight and the actual median weight of the group of 31 people?
A.0kg B. 4kg C. 35kg D. 7kg
Answers
Answer:
Omg itna bada question
Given : The average weight of a group of 30 friends increases by 1 kg when the weight of their football coach was added
average weight of the group after including the weight of the football coach is 31 kg,
To Find : what is the weight of their football coach ?
A.59kg B. 60 kg C. 61 kg D. 62 kg
Solution:
average weight of the group after including the weight of the football coach is 31 kg,
Weight before coach = 31 - 1 = 30 kg
a group of 30 friends before
30 + 1 = 31 after Adding Coach
Total Weight before = 30 x 30 = 900 kg
Total Weight after Adding Coach = 31 x 31 = 961 kg
Weight of Coach = 961 - 900 = 61 kg
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