istangot7
25.10.2021 •
Mathematics
In Jimmy's school there are 128 families which have 4 children. The circle graph shows the
probability of each combination of girls and boys in a family with four children. Use the circle graph to predict the
probability that one of these 128 families, chosen at random, will only have children of the same sex.
Families with 4 Children
3 boys, 1 girl - 14
4 girls - 1/16
4 boys - 1/16
3 girls, 1 boy
- 1/4
2 girls, 2 boys – 3/8
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Ответ:
Ответ:
Is known that
(a + b)² = a² + 2.a.b + b²
So:
(x + 4)² = x² + 2.x.4 + 4² = x² + 8x + 16