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lozanna [386]
3 years ago
9

Can someone please help me this is hard

Mathematics
2 answers:
Diano4ka-milaya [45]3 years ago
4 0

Answer:

subject.............

Step-by-step explanation:

name..................

charle [14.2K]3 years ago
3 0

woah!!!

what's this bro

pls tell me the subject name then I will research

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Make a tree diagram for two coins that are tossed. Find the theoretical probability that at least one coin is heads. Express the
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5 0
4 years ago
in a sample of 80 adults, 25 said that they would buy a car from a friend. three adults are selected at random without replaceme
PSYCHO15rus [73]

Answer:

31.9%

Step-by-step explanation:

We have that,

Total number of adults = 80

Number of people that would buy a car from a friend = 25

So, the number of people that would not buy a car from a friend = 80-25 = 55.

Since, three people are selected randomly.

Thus, the probability that none of them would buy a car from a friend is given by,

\frac{\binom{55}{3}}{\binom{80}{3}}

i.e. \frac{\frac{55!}{3!\times 52!}}{\frac{80!}{3!\times 77!}}

i.e. \frac{55!\times 3!\times 77!}{3!\times 52!\times 80!}

i.e. \frac{55\times 54\times 53}{80\times 79\times 78}

i.e. \frac{157410}{492960}

i.e. 0.319

Thus, the probability of people who would not buy a car from a friend is 0.319 i.e. 31.9%

5 0
3 years ago
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Viktor [21]

Answer:

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80km/h

Step-by-step explanation:

weighted average

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300/3.75

6 0
3 years ago
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