In a family with four children, what is the probabaility that 3 are girls and one is a boy

1 answer:

4 0

If we write all the possible combinations for this problem, 4/16 or 1/4 would be the answer.

BGGG
GBGG
GGBG
GGGB

This is not taking into consideration the specific order of the children. In case the order will be necessary, the Girls need to be labeled differently and permutation formula needs to be used.

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Betty has 741 coins in her piggy bank, worth a total of 10,725 cents. The piggy bank only contains quarters and dimes. How many

quester [9]

Let quarters = q and
Dimes = d

We have 741 coins total so q + d = 741

Since quarters are 25 cents and Dimes are 10 cents then

25q + 10d = 10725 cents

Now we have 2 equations that we can solve using addition or substitution.

Using addition, first multiply the first equation by -10

-10 (q+d) = 741 (-10)
-10q - 10d = -7410

Now add the equations together

(-10q -10d = -7410)
+ (25q + 10d =10725)
________________
15q = 3315
q = 3315 / 15
q = 221
this is the number of quarters

Now plug this back into the original equation

q + d = 741
221 + d = 741
d = 741 - 221
d = 520

There are 520 dimes

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myrzilka [38]

Answer:

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Step-by-step explanation:

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kkurt [141]

Answer: Your classmate incorrectly identified the sides that are proportional in the side-splitter theorem.

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Factor the expression using GCF

julsineya [31]

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