The average of 9 observations was 9, that of the 1st of 5 being 10 and that of the last 5 being 8. What was the 5th observation?

Related Mcqs:

The average of 11 numbers is 10.9. If the average of first six is 10.5 and that of the last six is 11.4 the sixth number is_____________?

A. 11.0 B. 11.3 C. 11.4 D. 11.5...

A man purchased 3 blankets @ Rs.100 each, 5 blankets @ Rs.150 each and two blankets at a certain rate which is now slipped off from his memory. But he remembers that the average price of the blankets was Rs.150. Find the unknown rate of two blankets?

A. Rs.150 B. Rs.225 C. Rs.250 D. None...

The average of four positive integers is 69. The highest integer is 93 and the least integer is 39. The difference between the remaining two integers is 28. Which of the following integers is the higher of the remaining two integers?

A. 58 B. 86 C. 49 D. None of these...

A total of 3000 chocolates were distributed among 120 boys and girls such that each boy received 2 chocolates and each girl received 3 chocolates. Find the respective number of boys and girls?

A. 70, 50 B. 60, 60 C. 50, 70 D. 40, 80...

The average of five consecutive odd numbers is 61. What is the difference between the highest and lowest numbers?

A. 2 B. 5 C. 8 D. Cannot be determined...