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dem82 [27]
3 years ago
6

George wants to buy a shirt that costs $69.00. He has a 20% off coupon. How much will

Mathematics
1 answer:
Vesnalui [34]3 years ago
7 0

Answer:

Step-by-step explanation:

the shirt costs $ 69....he has a 20% off coupon

lets find out how much he saves by using the coupon....so we find 20% of $ 69..

20% of 69....turn ur percent to a decimal...." of " means multiply

0.2(69) = $ 13.80 <== what the coupon saved him

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Answer:

P=\frac{2n!}{m!*(2n-m)!}*0.5^{2n}

Step-by-step explanation:

In a coin toss the  probability of tossing a head is 0.5 (50% head/50% tails)

If n is the number of rounds and 2n the number of coins tossed (one for each player), the probability of having m heads tossed is:

R=\frac{2n!}{m!*(2n-m)!}

R is the number of cases (combination of coins tossed) that gives a m number of heads. Each case has a probability of P_{case}=0.5^{2n} so:

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P=\frac{10!}{4!*(10-4)!}*0.5^{10}

P=\frac{10*9*8*7*6!}{4!*6!}*0.5^{10}

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P=\frac{10*9*8*7}{4!}*0.5^{10}=0.205

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Answer:

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Step-by-step explanation:

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