8th grade math. Please help!!
1 answer:
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Assuming that each marble can be picked with equal probability, we notice that there is a total of
marbles, of which 2 are red.
So, the probability of picking a red marble is
In fact, as in any other case of (finite) equidistribution, we used the formula
Answer:
80 members
Step-by-step explanation:
Let the band members be= b and the chorale members= c
Then, according to question, b=c+30 and
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Now, substituting the value of b=c+30, we get
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Therefore,
Therefore, there are 80 members in the band.