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4 years ago

Answerrrrrrrrrrrrrrrrrrrrrr nowwwwwww

Mathematics

1 answer:

MrMuchimi4 years ago

7 0

$\rm{\pink{\underline{\underline{\blue{ANSWER:-}}}}}$

√64 = 8

$\rm{8\dfrac{1}{7}\:=\:57/7}$ = 8.142

$\rm{8.\overline{14}}$ = 8.1414..

15/2 = 7.5

=> 8.142 > 8.1414 > 8 > 7.5 .

$\rm\red{\therefore}$ 2) $\rm{8\dfrac{1}{7}}$ , $\rm{8.\overline{14}}$ , √64 , 15/2

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Answer:

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3 years ago

If a student randomly guesses at 20 multiple-choice questions, find the probability that the student gets exactly four correct.

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Answer:

Probability = 0.190

Step-by-step explanation:

Given:

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Now, 'p' and 'q' are complements of each other. Therefore,

$q=1-p=1-0.25=0.75$

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Using Bernoulli's theorem to find 'x' successes from 'n' questions, we get:

$P(x)=_{x}^{n}\textrm{C}p^xq^{n-x}$

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$P(4)=_{4}^{20}\textrm{C}(0.25)^4(0.75)^{20-4}\\P(4)=_{4}^{20}\textrm{C}(0.25)^4(0.75)^{16}\\P(4)=4845\times (0.25)^4\times (0.65)^{16}\\\\P(4)=0.1896\approx0.190$

Therefore, the probability of getting 4 correct answers out of 20 questions is 0.190.

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3 years ago

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3 years ago

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3 years ago

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Answer:

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