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3 years ago

2 qurstions 100 points

Mathematics

1 answer:

Roman55 [17]3 years ago

6 0

Answer:

1). 1.25 / 250 = .005M

.005 = 1 liter

2). (20)(.5) = 10M

have a good day, and be safe

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Probability= $\frac{\text{number of favourable outcomes}}{\text{total number of outcomes}}$

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Probability for a randomly chosen girl to be senior= $\frac{7}{8+11+9+7}=\frac{7}{35}=\frac{1}{5}$

Probability for a randomly chosen boy to be senior= $\frac{\text{number of senior boys}}{\text{total number of boys}}$

Probability for a randomly chosen girl to be senior= $\frac{9}{10+7+10+9}=\frac{9}{36}=\frac{1}{4}$

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Since choosing boys and girls is independent,

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So,required probability is $\frac{1}{20}$

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