Let present age of A, B and C is ‘x’ years, ‘y’ years and ‘z’ years. So, x + 12 + y + 12 = 94 So, x + y = 70 Sum of ages of A and C 8 years ago = 70 – 8 × 2 = 54 years Age of C, 8 years ago = 54/3 × 2 = 36 years Present age of C = 36 + 8 = 44 years
Find the sum of all number divisible by 6 in between 50 to 200.
A 200-litre mixture of milk and water is currently in the ratio 3:5. To reduce the percentage of milk in the mixture to 25%, how ...
14, 28, 56, 112, ...... The sum of first 10 numbers in the series is:
The marks obtained by 12 students out of a maximum of 30 in a test are given as 25, 28, 24, 22, 25, 18, 20, 22, 19, 23, 22, and 26. Find the sum of the ...
Matthew sells Chocolates in the packs of 6 chocolates, 12 chocolates, 18 chocolates and 24 chocolates etc, but the rate is necessarily uniform. One day ...
Find the variance of the following data points:
6, 7, 5, 9, 11, 14
The sum to n terms of the series 1 + 1 + 3 + 1 + 3 + 5 + 1 + 3 + 5 + 7 …………………… is
Meera buys a laptop and sells it to Sneha at a profit of 25%. Sneha then sells it to Tushar at a loss of 10%. If Tushar buys the laptop for Rs. 36,450, ...
The sum of 6 consecutive odd numbers is 156. What will be the product of first number and the last number?
The mean of a distribution is 25 and the standard deviation is 5. What is the value of coefficient variation?
