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The average age of a class is 15.8 years. The average age of the boys in the class is 16.4 yrs while that of the girls is 15.4 years. What is the ratio of boys to girls in the class?
Option 1: 1:2
Option 2: 3:5
Option 3: 3:4
Option 4: 2:3
Option 5:
The average age of 30 students of a class is 12 years. The average age of a group of 5 of the students is 10 years and that of another gfoup of 5 of them is 14 years. What is the average age oi the remaining students?
Option 1: 8
Option 2: 12
Option 3: 10
Option 4: 14
Option 5:
A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If he had scored 92 points; the average score for the team would have been 84. The number of points, the team scored, was :.
Option 1: 672
Option 2: 645
Option 3: 665
Option 4: 588
Option 5:
The average of 50 numbers is 38. If two numbers, namely 45 and 55 are discarded, the average of the remaining numbers is
Option 1: 36.5
Option 2: 37.5
Option 3: 37
Option 4: 37.52
Option 5:
Three years ago, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is the same today . The present age of the baby is
Option 1: 2
Option 2: 3
Option 3: 2.4
Option 4: 1.5
Option 5:
The average of 13 results is 40 and that of first six is 30 and last six is 34. Find the value of 7 th number.
Option 1: 116
Option 2: 126
Option 3: 136
Option 4: 146
Option 5:
In a class, there are 20 students whose average age is decreased by two months, when one student aged 18 years is replaced by a new student, find the age of the new student ?
Option 1: 14 years 8 months
Option 2: 15 years 8 months
Option 3: 16 years 8 months
Option 4: 17 years 8 months
Option 5:
A man divides his total journey into three equal parts and decides to travel the three parts with speeds 60 km / hr , 24 km / hr and 45 km /hr . Find the average speed during the whole journey ?
Option 1: 36.24 km / hr
Option 2: 37.24 km / hr
Option 3: 38.24 km / hr
Option 4: 37.34 km / hr
Option 5:
The average of two numbers is M. If one number is N, then the other number is.
Option 1: 2N
Option 2: M-N
Option 3: 2M
Option 4: 2M-N
Option 5:
The average of all odd numbers upto 100 is
Option 1: 51
Option 2: 48.5
Option 3: 50
Option 4: 49.2
Option 5:
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