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3 years ago

What is the value of x

Mathematics

1 answer:

Bess [88]3 years ago

6 0

13x = 12x + 3
x = 3

m<1 = 13x = 13(3) = 39

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A statistics textbook chapter contains 60 exercises, 6 of which are essay questions. A student is assigned 10 problems. (a) What

Scilla [17]

Answer:

a) P=0.3174

b) P=0.4232

c) P=0.2594

d) The shape of the hypergeometric, in this case, is like a binomial with mean np=1.

Step-by-step explanation:

The appropiate distribution to model this is the hypergeometric distribution:

$P(X=x)=\frac{\binom{s}{x}\binom{N-s}{M-x}}{\binom{N}{M}}=\frac{\binom{6}{x}\binom{54}{10-x}}{\binom{60}{10}}$

a) What is the probability that none of the questions are essay?

$P(X=0)=\frac{\binom{6}{0}\binom{54}{10-0}}{\binom{60}{10}}\\\\P(X=0)=\frac{1*(54!/(10!*44!)}{60!/(10!*50!)} =\frac{2.3931*10^{10}}{7.5394*10^{10}} = 0.3174$

b) What is the probability that at least one is essay?

$P(X=1)=\frac{\binom{6}{1}\binom{54}{9}}{\binom{60}{10}}\\\\P(X=1)=\frac{6*(54!/(9!*43!)}{60!/(10!*50!)} =\frac{3.1908*10^{10}}{7.5394*10^{10}} =0.4232$

c) What is the probability that two or more are essay?

$P(X\geq2)=1-(P(0)+P(1))=1-(0.3174+0.4232)=1-0.7406=0.2594$

8 0

3 years ago

Is my answer correct

Kryger [21]

Yes it is thirty because when u do 5×2×3 the correct answer turns out to be 30 $o yes!!!!!!

4 0

3 years ago

Read 2 more answers

* 9. Two fifths of what number is 120?<br> 2/5

slava [35]

Answer:

300

Step-by-step explanation:

120 ÷ 2/5 = 300

8 0

3 years ago

Read 2 more answers

(7x10^-6) (8x 10^-5)

DENIUS [597]

Answer:

56x^2 + 10^-11

Step-by-step explanation:

multiply the 7x and 8x and you get 56x^2

multiply the 10^-6 and 10^5-5 and you get 10^-11

8 0

3 years ago

The Sugar Sweet Company is going to transport its sugar to market. It will cost $4500 to rent trucks, and it will cost an additi

MariettaO [177]

C(s) = 175s + 4500 or y = 175x + 4500

cost of 12 tons of sugar...
C(12) = 175(12) + 4500
C(12) = 2100 + 4500
C(12) = 6600....so 12 tons of sugar will cost u $ 6600

5 0

3 years ago