Mathematics: The a.p. statistics exam consists of a multiple-choice section in which each question has five choices. sara estimates that she has a 75% chance of knowing each question. if she does not know the answer, she will randomly guess. a) what is the probability of sara getting a question correct? b) the a.p. exam has 40 questions, how many might sara expect to get correct?

The a.p. statistics exam consists of a multiple-choice

Ответ:

nannagarvey9945

06.01.2022

A)
75% she knows for sure
Out of the remaining 25%, she has a 1/5 or 20% chance of getting it right. So,
1/4 x 1/5 x 100 = 5%
Total chance of getting a question right:
75 + 5 = 80%
b) If the total is 40, she can expect to get
80% x 40 = 32 questions correct.

0,0(0 оценок)

Ответ:

jahmira96

09.03.2021

Mathematics

See Explanation

Step-by-step explanation:

$\overline{FH} \: bisects \: \angle EHG... (given) \\\\In\: \triangle FEH \: and\:\triangle FGH\\\\\angle FEH\cong\angle FGH.. (given) \\\\\angle EHF\cong\angle GHF\\(\because \overline{FH} \: bisects \: \angle EHG) \\\\\overline{FH} \cong \overline{FH}...(common)\\ \\ \therefore \triangle FEH \cong\triangle FGH(AAS \: Postulate)$

0,0(0 оценок)

Ответ:

Ответ:

Ask your question to the AI advisor

More tips

Answers on questions: Mathematics

Ask an AI advisor a question