Question : The average weight of three men, A, B and C is 84 kg. Another man, D, joins the group and the average now becomes 80 kg. If another man, E, whose weight is 3 kg more than that of D, replaces A, then the average weight of B, C, D and E becomes 79 kg. Then the weight of A is:
Option 1: 72 kg
Option 2: 74 kg
Option 3: 75 kg
Option 4: 76 kg
Correct Answer: 75 kg
Solution : Given: The average weight of three men, A, B, and C, is 84 kg. Another man, D, joins the group and the average now becomes 80 kg. If another man, E, whose weight is 3 kg more than that of D, replaces A, then the average weight of B, C, D, and E becomes 79 kg. Total weight of A + B + C = (84 × 3) = 252 kg Total weight of A + B + C + D = (80 × 4) = 320 kg So, the weight of D = (320 – 252) = 68 kg Now weight of E = (68 + 3) = 71 kg Total weight of B + C + D + E = (79 × 4) = 316 kg So, the total weight of B + C = (316 – 68 – 71) = 177 kg $\therefore$ The weight of A = (252 – 177) = 75 kg Hence, the correct answer is 75 kg.
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Question : The average weight of three men A, B, and C is 84 kg. Another man, D joins the group and the average now becomes 80 kg. If another man, E whose weight is 3 kg more than that of D, replaces A, then the average weight of B, C, D, and E becomes 79 kg. Then the weight of A
Question : The average weight of a group of 3 people A. B and C is 70 kg. When D joins this group, the average becomes 60 kg. One man E, whose weight is 5 kg more than that of D, replaces A and the average weight of B, C, D, and E now becomes 59 kg. A's weight (in kg) is:
Question : The average weight of a group of 3 people A, B and C is 70 kg. When D joins this group, the average becomes 60 kg. A man E, whose weight is 5 kg more than that of D, replaces A and the average weight of B, C, D, and E now becomes 59 kg. What is the average weight (in kg) of A,
Question : The average weight of A, B and C is 65 kg. If the average weight of A and B is 63.5 kg, and the average weight of A and C is 67.5 kg, then the weight of A (in kg) is:
Question : The average weight of A, B, and C is 65 kg. If the average weight of C and B is 61.5 kg, and the average weight of A and C is 68.5 kg, then the weight of C (in kg) is:
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