The average weight of Ajay's brother and sister is 39 kg. The average weight of all three of them is 30 kg. What is Ajay's weight in kilograms? A 3 B 9 C 12 D 34.5 plzzz answer fast
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Answer:
12 Kg
Step-by-step explanation:
Average weight of Bro and Sis= 39
Sum of the weight of two= 78kg
Again,
Average weight of three=30kg
Sum of three= 90kg
Now, Ajay's weight= 90-78
=12Kg
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