Draw a bar model: Boys = 1 unit, Girls = 5 units, Adults = 1 unit + 377.

Total = 7 units + 377 = 2,113.

Total in units	=	1 + 5 + 1 = 7 units + 377 = 2,113
7 units	=	2,113 - 377 = 1,736
1 unit (boys)	=	1,736 ÷ 7 = 248
Girls (5 units)	=	5 × 248 = 1,240