IBM
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Numerical Ability
Averages
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?
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- 24 years
Total age of 12 students = 12 * 20 = 240
New avg = 21 yrs
Total age of 16 students = 16 * 21 = 336
Total age of the 4 new students = 336 - 240 = 96
Avg age of the new students = 96 / 4 = 24 years - 12 years agoHelpfull: Yes(24) No(0)
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