Question
The average weight of 16 people in a group is 75 kg. If
the heaviest person who weighs 95 kg is replaced by a new person, and the average weight of the group drops to 73 kg, what is the weight of the new person?Solution
Total weight of 16 people = 16 × 75 = 1200 kg. Let the weight of the new person be y kg. Removing the heaviest person (95 kg) and adding the new person: New total weight = 1200 - 95 + y New average weight with the new person is 73 kg 1200 - 95 + y = 73 × 16 1200 - 95 + y = 1168 y = 1168 - 1105 y = 63 = 63 kg
1.25 × 36 + 2.75 × 40 = ? × 3.1
- Evaluate: 195 ÷ 13 × 8 + 220 – 30% of 500
[∛(91125/19683 )- ∛(3375/5832 ) ] × ∛(512/9261) = ? - √(484/3969)
- Determine the value of following expression:
[{(148 + 32) ÷ 9}% x 1350] + 19 Simplify:
What will come in the place of question mark (?) in the given expression?
24% of 350 + 246 = ? + 50 × 2.5
What will come in the place of question mark (?) in the given expression?
? = {1026 ÷ 54 + 17 × 13 – (384 ÷ 24)}Â
What will come in the place of question mark (?) in the given expression?
(437 + ? - 167) x 2.5 = 875(5/8 + 7/12) x 168 = ? + 93 - 25
