Объяснение:
10!/(3!*(10-3)!)=10!/(3!*7!)=8*9*10/(2*3)=4*3*10=120
9!/(4!*5!)=6*7*8*9/(2*3*4)=3*7*2*3=126
120+126=246
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Объяснение:
10!/(3!*(10-3)!)=10!/(3!*7!)=8*9*10/(2*3)=4*3*10=120
9!/(4!*5!)=6*7*8*9/(2*3*4)=3*7*2*3=126
120+126=246