Question Detail The average age of the mother and her six children is 12 years which is reduced by 5 years if the age of the mother is excluded. How old is the mother 40414243 Answer: Option C Similar Questions : 1. The average score of a cricketer for ten matches is 38.9 runs. If the average for first six matches is 42, then average for last four matches is 33.2532.2534.2534.50 Answer: Option CExplanation:\begin{aligned} = \frac{(38.9 \times 10)-(42 \times 6)}{4} \end{aligned} \begin{aligned} = \frac{(1216 - 750)}{4} = 34.25 \end{aligned} 2. Reeya obtained 65, 67, 76, 82 and 85 out of 100 in different subjects, What will be the average. 70758085 Answer: Option BExplanation:\begin{aligned} ( \frac {65+67+76+82+85}{5} ) = 75 \end{aligned} 3. Average of first five multiples of 3 is 9111315 Answer: Option AExplanation:\begin{aligned} Average = \frac{3(1+2+3+4+5)}{5} = \frac{45}{5} = 9 \end{aligned} 4. The average of four consecutive odd numbers is 24. Find the largest number. 25272931 Answer: Option BExplanation:Let the numbers are x, x+2, x+4, x+6, then \begin{aligned} => \frac{x+(x+2)+(x+4)+(x+6)}{4} = 24 \end{aligned} \begin{aligned} => \frac{4x+12)}{4} = 24 \end{aligned} \begin{aligned} => x+3 = 24 => x = 21 \end{aligned} So largest number is 21 + 6 = 27 5. Average of five numbers is 27. If one number is excluded the average becomes 25. The excluded number is 35455565 Answer: Option AExplanation:Number is (5*27) - (4*25) = 135-100 = 35 Read more from - Average Questions Answers