10, 12, 21, 23, 30, 32 ............................................
11 - 5 ; x - 100
x = (11 • 100)/5
x = 220
220 - 100 ; x - 15
x = ( 220 • 15)/100
x = 33
220 - 100 ; x - 20
x = (220 • 20)/100
x = 44
220 - 100 ; x - 35
x = ( 220 • 35)/100
x = 77
220 - 100 ; x - 50
x = (220 • 50)/100
x = 110
220 - 100 ; x - 100
x = (220 • 100)/100
x = 220
(35×28+35×32)/(60×15)=35(28+32)/60×15=35×60/60×15=35/15=7/3
1) 60\10=6( п) по истории
2)40\10=4(п) по гиографии
3) 6+4= 10 (п) всего