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3 years ago

A bag contains 10 black marbles and 6 red marbles. If a red

Mathematics

1 answer:

bonufazy [111]3 years ago

7 0

Answer:

66.67% probability of selecting a black marble from the bag.

Step-by-step explanation:

Initially there are 16 marbles, 10 of which are black and 6 of which are red.

A red marble is drawn and not put back. So now there are 15 marbles, of which 10 are black.

So there is a 10/15 = 2/3 = 0.666% 7 = 66.67% probability of selecting a black marble from the bag.

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We know that the global mean was 70, meaning that

$\dfrac{b_1+b_2+\ldots+b_{20}+g_1+g_2+\ldots+g_{10}}{30}=70$

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Answer:

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$5(y - 3.8) = 4.7(y - 4)$

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