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zvonat [6]
3 years ago
12

All of them I need help please

Mathematics
1 answer:
NemiM [27]3 years ago
7 0
19. 

2568.75 - 2500 = 68.75;

( ? / 100 ) * 2500 = 68.75 ;

? * 25 = 68.75;

? = 68.75 ÷ 25

? = 2.75;

r = 2.75 %
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Step-by-step explanation:

Given : Mr. and Mrs. Romero are expecting triplets. Suppose the chance of each child being a boy is 50% and of being a girl is 50%.

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2) P(two boys and one girl)

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