Question
A set of 50 observations has an average of 63. Find the new
average when each observation is increased 8 times.Solution
ATQ,
New average = 63 × 8 = 504
In a class of boys and girls, the number of girls is twice the number of boys. If 30 mere boys join the class, the ratio of girls and boys is 1: 1. How ...
A, B And C did certain investments and the ratio of their time periods is 3:2:7 respectively. The ratio of the profit of A, B, and C is 4:3:14 respectiv...
The salaries of Ravi and Sumit are in the ratio 4: 5. If the salary of each is increased by Rs6,000 the new ratio becomes 35:40. What will be Sumit's in...
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In a garage, 80% of the vehicles are two-wheelers and the remaining are four-wheelers. Find the ratio of the number of wheels of two-wheelers to that of...
Four numbers A, B, C and D are such that the ratio of A:B is 4:7 and ratio of B:C is 3:5. If the sum of A and D is 100 and sum of C and D is 146, then f...
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Suppose 6A = 8B = 15C, then find the value of (A:B:C) .
The ratio of the number of females to that of male employees in a small company is 2: 3. If the number of male employees in the company is 90, then the ...
The ratio of milk to water in a mixture is 5:3. If 16 liters of water is added, the ratio becomes 5:7. Find the initial quantity of milk in the mixture.
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