Question
The average number of biscuits in Box S, Box T and Box U is 47. Box S has 21 biscuits. The number of biscuits in Box T is twice the number of biscuits in Box U. What is the number of biscuits in Box U?
2 m

Click button first when a symbol is required. X

The average number of biscuits in Box S, Box T and Box U is 47. Box S has 21 biscuits. The number of biscuits in Box T is twice the number of biscuits in Box U. What is the number of biscuits in Box U?