tổng số tiền cả gia đình thu được là:
800000*3=2400000(đồng)
sau khi thêm 1 con thì bình quân số tiền mỗi người thu được là:
2400000/(3+1)= 600000(đồng)
sau khi thêm 1 con thì bình quân số tiền mỗi người thu được giảm đi là:
800000-600000=200000(đồng)
đáp số: 200000 đồng
Thu nhập mỗi tháng của gia đình đó là:
800 000 x 3 = 2 400 000 (đồng)
Nếu có thêm một con nữa thì bình quân thu nhập của mỗi người sẽ là:
2 400 000 : (3 + 1) = 600 000 ( đồng)
Bình quân thu nhập của mỗi người giảm đi:
800 000 – 600 000 = 200 000 (đồng)
Đáp số: 200 00 đồng.
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600 000 đồng nhé
