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3 years ago

Need help with maths

Mathematics

2 answers:

Kamila [148]3 years ago

6 0

Answer:

a) 48

c) 13, 23, 43,

Step-by-step explanation:

since i helped you with a and c, try and figure out b on your own.

i will give you a link if you want it so you can watch a video on how to find square numbers

Tema [17]3 years ago

5 0

Answer:

a) 48

b) 81

c) 13, 23, 43

Step-by-step explanation:

$\sqrt{81} =9$

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3 years ago

On Saturday a library checked out 52 books.if 24 of the books were fiction what is the ratio of nonfiction books to fiction book

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4 years ago

2z^4-10z^3+4z^2 factorable?

charle [14.2K]

Yes
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3 years ago

In a survey of adults who follow more than one sport, 30% listed football as their favorite sport. You survey 15 adults who foll

maxonik [38]

Answer: 0.5

Step-by-step explanation:

Binomial probability formula :-

$P(x)=^nC_x\ p^x(q)^{n-x}$ , where P(x) is the probability of getting success in x trials , n is the total trials and p is the probability of getting success in each trial.

Given : The probability that the adults follow more than one game = 0.30

Then , q= 1-p = 1-0.30=0.70

The number of adults surveyed : n= 15

Let X be represents the adults who follow more than one sport.

Then , the probability that fewer than 4 of them will say that football is their favorite sport,

$P(X\leq4)=P(x=0)+P(x=1)+P(x=2)+P(x=3)+P(x=4)\\\\=^{15}C_{0}\ (0.30)^0(0.70)^{15}+^{15}C_{1}\ (0.30)^1(0.70)^{14}+^{15}C_{2}\ (0.30)^2(0.70)^{13}+^{15}C_{3}\ (0.30)^3(0.70)^{12}+^{15}C_{4}\ (0.30)^4(0.70)^{11}\\\\=(0.30)^0(0.70)^{15}+15(0.30)^1(0.70)^{14}+105(0.30)^2(0.70)^{13}+455(0.30)^3(0.70)^{12}+1365(0.30)^4(0.70)^{11}\\\\=0.515491059227\approx0.5$

Hence, the probability rounded to the nearest tenth that fewer than 4 of them will say that football is their favorite sport =0.5

4 0

3 years ago