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Average age of 20 students is 21 years. 2 students leave the group and 1 new student joins the group. The average now becomes 20 years. If age ofone of the student who left the group is 26 years and the one who joined is 20 years, then what is the age (in years) of the other student who left the group?
A
20
B
14
C
22
D
16
Correct Answer:
14
The average age of a group of 10 students was 20. The average age increased by 2 years when two new students joined the group. What is the average age of the group. What is the average age of the two new students who joined the group?
A
22 years
B
30 years
C
40 years
D
32 years
The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?
A
10
B
11
C
8
D
9
The average marks obtained by a group of 10 students were 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.6. What were the average marks obtained by the student who left and the one who joined?
A
14
B
15
C
16
D
23
The average age of 30 students of a class is 14 years 4 months. After admission of 5 new students in the class the average becomes 13 years 9 months. The youngest one of the five new students is 9 years 11 months old. The average age of the remaining 4 new students is :
A
10 years 4 months
B
12 years 4 months
C
11 years 2 months
D
13 years 6 months
The average age of group of 10 students is 15 years. When 5 new students joined the group, the average age rose by 1 year. The average age (in years) of the new student is :
A
18 years
B
17 years
C
16 years
D
None of these
The average age of a group o f10 students was 20. The average age increased by 2 years when two new students joined the group students who joined the group?
A
22 years
B
30 years
C
40 years
D
32 years
The average age of a group of 10 students is 15 years . when 5 more students joined the group , the average age rose by 1 year. what is average age of the newly joined students?
A
16
B
17
C
18
D
19
Among four students sitting in a row, average age of last three students is 20 years and the average age of first three students is 21 years. If the age of first student is 26 years, then what is the age (in years) of the last student?
A
23
B
37
C
24
D
29
The average of a group of 10 students is 15 years. When 5 more students joined the group, the average age rose by 1 year. What is the average age of the newly joined students?
A
16
B
17
C
18
D
19
In a group of 120 people, one-fifth are men, one-fourth are women and the rest children. The average age of women is five-sixth of the average age of men. Average age of children is one-fourth of the average age of men. If average age of men is 60 years, what is the average age of the group?
A
32.75 yeras
B
38.45 years
C
45.25 years
D
50.5 years