Question
Each question contains a statement followed by Quantity
I and II. Read the information clearly and answer your questions accordingly. Quantity I: The average weight of 30 people is increased by 1.5 kg when one man weight 48 kg is replaced by another man. Find the weight of new man? Quantity II: The average weight of 60 students in a class is 70 kg. The weights of two students were wrongly entered as 72 kg and 64 kg instead of 64 kg and 52 kg respectively. Find the corrected average weight of the class? ÂSolution
Quantity I: Increased Average = 1.5, Number of people (n) = 30 Average = Total sum/n Total weight increased = 1.5 × 30 = 45 kg Weight of new man = 45 + 48 = 93 kg Quantity II: Total weight of 60 students = 60 × 70 New weight = (60 × 70) – 72 – 64 + 64 + 52 = (60 × 70) – 20 New average = (4200 – 20)/60 = 69.66 kgÂ
- 'Amit', 'Ravi', and 'Neha' can finish a piece of work in 66, 99, and 132 days respectively. They all started the work, but Amit left 8 days before the work...
Ratio of the work done by P, Q and R in one day is 7:4:9 respectively. They all together can complete the work in 44 days. Q and R worked on it for 30 d...
A 210 litres mixture contains only water and phenyl in the ratio 3:2, respectively. If 60 litres of this mixture is replaced with 100 litres of alcohol,...
- A firm assigned 10 technicians to complete an assignment in 30 days. After 12 days of work, 4 technicians were moved to another location. What is the exten...
- Suppose D, E and F can do a piece of work individually in 18, 27 and 36 days respectively. If they combine and work for 4 days, what percentage of work wou...
A can complete a work in 12 days and B can complete the same work in 18 days. They work together for 4 days and then B leaves. In how many more days wil...
A man, a woman and a boy can do a work in 3, 2, 6 days respectively. How many children were required with 1 man and 1 woman to complete the same work in...
‘X’ and ‘Y’ together can complete a work in 10 days, while ‘Y’ and ‘Z’ together can complete the work in 8 days. If ‘Y’ takes 12 day...
- 25 employees working 9 hours a day take 20 days to complete a project. How many employees working for 8 hours a day are needed to complete twice the given ...
A team of 12 men and 18 women can complete a construction project in 24 days. If 6 women alone can do the same project in 144 days, how many days will 4...
Relevant for Exams:
