Related Questions

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
চারটি সমানুপাতিক রাশির প্রান্তীয় রাশি দুটির গুনফল ২০০। প্রথম রাশিঃ দ্বিতীয় রাশি= ১ঃ২, দ্বিতীয় রাশিঃচতুর্থ রাশি= ১ঃ৪। তৃতীয় রাশিটি কত?
A ৫
B ১০
C ২০
D ৪০
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 age of a group of 12 students is 20 years, If 4 more students join the group, the average age increases by 1 year, the average age of the new students is
A 28
B 26
C 24
D 22
The average age of a group of 10 students is 15 years . when 5 more students joined the group , the average age rise 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 age of group of 10 students is 15 years. When 5 new students joined the group, the average age rise 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 12 students is 20 years, If 4 more students Join the group, the average age increases by 1 year, the average age of the new student is-
A 28
B 26
C 24
D 22
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

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