Question
The average of ten positive numbers is calculated as 56.
On observing, it was found that two numbers 64 and 32 are wrongly interpreted as 76 and 52, respectively. Find the correct average of the numbers.Solution
ATQ, Sum of ten numbers = 56 × 10 = 560 Correct sum of ten numbers = 560 - (76 + 52) + (64 + 32) = 528 Therefore, correct average = 528 / 10 = 52.8
The smallest fraction, which should be added to the sum of2(1/2), 3(1/3), 4(1/4) and 5(1/5) to make the result a whole number, is
A man invested a sum of money at compound interest. It amounted to Rs. 2420 in 2 years and to Rs. 2662 in 3 years. Find the sum.
Solve : (3.2 × 104) ÷ (2 × 105)
3,000 ___ 15 ___ 4 ___ (20)² ___ 20 = 32,200
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The sum of three consecutive even numbers is 28 more than the average of these three numbers. Then the smallest of these three numbers is
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