Question
A’s age is 120% of what he was 5 years ago, But 40% of
what it will be after 5 years. What is his present age?Solution
Let present age of A be x years. => 120% of (x - 5) = 40% of (x + 5) => 3(x - 5) = (x + 5) => 3x – 15 = x + 5 => x = 10 years
Amish invested 2500 Rupees in each of these schemes, offering simple interest of 12% per annum. 16% P.A. and 15% PA. respectively. Find the total intere...
The mode and the mean of grouped data are 25 and 29.5 respectively. Find the median, correct to two places of decimal, using empirical relation.
If A and B are two sets such that the number of elements in A is 20, a number of elements in B is 18 and the number of elements in both A and B is 10, f...
What will be the mode of the following data?
13, 15, 31, 12, 27, 13, 27, 30, 27, 28 and 16
If the number 9458k2 is divisible by 8, then find the number of possible values of 'k'.
[16 × 15 + 224 × 5] ÷ 5 = ? × 4
The sum of three numbers in AP is 21, and their product is 315. Find the numbers.
The cost of an item is 'A'. A shopkeeper increases the price by 'x'%, then applies a discount of 'd'% on the increased price. Aft...
Find the mode of the following data:
6,15,18,6,18,11,23,22,6,18,15,22,12
If 5th term of an AP is 20 and 10th term is 45, find 25th term.
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