Question 79

Of the 3 numbers whose average is 70, the first is 1/9 times the sum of other 2. The first number is

Solution

Let the three numbers be $$x,y,z$$

Sum of three numbers = $$x + y + z = 70 \times 3 = 210$$

According to ques, => $$x = \frac{1}{9} \times (y + z)$$

=> $$x = \frac{1}{9} \times (210 - x)$$

=> $$9x = 210 - x$$

=> $$9x + x = 10x = 210$$

=> $$x = \frac{210}{10} = 21$$

Share on Whatsapp Share on Whatsapp

Create a FREE account and get: