Answer:
£231 [Henry]
Explanation:
Gavin= y
Henry= 3 x y= 3y
Mark= 2 x 3y= 6y
6y+3y+y= 10y
Henry:
*( 3y/10y ) x 770= ?
↓
* 'y' gets cancelled out during the division.
∴ (3/10) x 770 → 10 and 770 get cancelled out to give 77
⇒ 3x77= 231
(Ans) £231
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