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k0ka [10]
3 years ago
6

Who Washes? Erica and Aaron, who are siblings, have decided to use a lottery system to decide who will wash dishes every night.

They will put some power chips into a bag, some red and some blue.

Mathematics
1 answer:
Anestetic [448]3 years ago
3 0

Given that Erica and AAron,are using lottery system to decide who will wash dishes every night.

They put some red and blue power chips and draw each one.  If same colour, Aaron will wash and if not same colours Erica will wash

If the game is to be fair, then both should have equal chances of opportunity for washing.

i.e. Probability for Erica washing = Prob of Aaron washing

i.e. P(different chips) = P(same colour chips)

Say there are m red colours and n blue colours.

Both are drawing at the same time.

Hence Prob (getting same colour) = (mC2+nC2)/(m+n)C2

Probfor different colour = mC1+nC1/(m+n)C2

The two would be equal is mC2 +nC2 = m+n

This is possible if mC2 =m and nC2 = n.

Or m = 2+1 =3 and n =3

That for a fair game we must have both colours to be 3.


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Stella [2.4K]

This can be solved by Newton's binomial formula

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The correct answer is A.

Good luck!!!


8 0
3 years ago
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Answer:

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Step-by-step explanation:

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BARSIC [14]
ANSWER:
B. $3.50


STEP BY STEP EXPLANATION:

We start out with buying the stock for $15.75 then sell it at $19.25. We need to find the difference.

Subtract $15.75 from $19.25

19.25 - 15.75 = 3.50

To check your work add $3.50 to $15.75

15.75 + 3.50 = 19.25


Hope this helps and please mark brainliest! : )
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