The average age of 7 boys is increased by 1 year when one of tem whose age is replaced by a girl. What is the age of the girl ?5
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Q: The average age of 7 boys is increased by 1 year when one of tem whose age is replaced by a girl. What is the age of the girl ?
- 133 yrsfalse
- 227 yrsfalse
- 321 yrsfalse
- 429 yrstrue
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