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givi [52]
3 years ago
13

Please help me with these math questions!

Mathematics
1 answer:
guapka [62]3 years ago
6 0

Answer:

  • 7 : 7.36
  • 10 : 4
  • 11 : 1.1067
  • 12 : 0.8165
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Answer:

P=1/42.

Step-by-step explanation:

We know that the student council has 10 members where 5 of the members are Seniors. They need to choose a President, Vice President, Secretary and Treasurer. We calculate the probability that the President is a Senior:

We calculate the number of possible combinations:

C_4^{10}=\frac{10!}{4!(10-4)!}=210

Number of favorable combinations is 5.

Threfore, the probability is

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