The average number of chocolates with six children is six. If another child joined them then the average number of chocolates with the seven children will become 7. What is the number of chocolates with the seventh child?
- A14
- B11
- C12
- D13
Solution & Step-by-step Explanation
Total number of chocolates with 6 children:
Total
6
=6×6=36
Total number of chocolates with 7 children:
Total
7
=7×7=49
Chocolates with the 7
th
child:
Chocolates=Total
7
−Total
6
=49−36=13
Total
6
=6×6=36
Total number of chocolates with 7 children:
Total
7
=7×7=49
Chocolates with the 7
th
child:
Chocolates=Total
7
−Total
6
=49−36=13