avg. of 11 players is 30. if teacher's age includes than avg. is increase by 20%. what is teacher's age
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let the total age of 11players=x
so average=x/11=30
=>x=30*11=330
teacher's age is 20% of this
so if teacher's age is y then,(y/330)*100=20
=> 10y/33=20
=>y=66.
so average=x/11=30
=>x=30*11=330
teacher's age is 20% of this
so if teacher's age is y then,(y/330)*100=20
=> 10y/33=20
=>y=66.
pushpendra20:
avg. increase by 20%. then why it's calculated 330×20%
simple ,because the average is increased by 20% of 330.
got ?
ok
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