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I have N marbles. My elder brother has 3 more than mine, while my younger brother has 3 less than mine. If the total number of marbles is 15, the number of marbles that I have is
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- 3
- 5
- 8
- 7
Correct Option: B
According to question ,
Number of marbles' my elder brother = N + 3
Number of marbles' my younger brother = N - 3
Total number of marbles = N + N + 3 + N – 3 = 3N
∴ 3N = 15 ⇒ N = 5
