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Maths Puzzle
Numerical Ability
Permutation and Combination
in a class two students aged 16yrs and 18 yrs are replaced by two students whose age is 19yrs and 21 yrs.if the avearge age of the cls os increased by 3 months.?How many students are there in the class?
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- total number of students are 2.
- 9 years agoHelpfull: Yes(0) No(0)
- explanation please
- 9 years agoHelpfull: Yes(0) No(0)
- Total no of student is 24 .
age increase (19+21) - (16+18)=6yr= 96 months
avg age increase 3 months
so 96/3=24 - 9 years agoHelpfull: Yes(0) No(1)
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