Join ExamsbookAnswer : 4. "36"
Some children goto ice-cream shop. 9 flavours are available there. Each child takes a cone with two different flavours. No two children take same combination and they have taken all such possible combinations. How many children went to ice cream shop ?5
Q: Some children goto ice-cream shop. 9 flavours are available there. Each child takes a cone with two different flavours. No two children take same combination and they have taken all such possible combinations. How many children went to ice cream shop ?
- 128false
- 256false
- 344false
- 436true
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Answer : 4. "36"
Explanation :
Answer: D) 36 Explanation: Given there are 9 flavours of ice creams. Each child takes the combination of two flavours and no two children will have the same combination This can be done by ways i.e children. Number of children=C29 = 9 x 8 / 1x 2 = 36.