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zavuch27 [327]
3 years ago
13

a bookcase contains 2 statistics books and 4 biology books. if 2 books are chosen at random,the chance that both are statistics

books is
Mathematics
1 answer:
azamat3 years ago
5 0
Do you want a ratio? If so 1:2
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The probability that a student uses Smarthinking Online Tutoring on a regular basis is 0.31 . In a group of 21 students, what is
Ivenika [448]

Answer: 0.0241

Step-by-step explanation:

This is solved using the probability distribution formula for random variables where the combination formula for selection is used to determine the probability of these random variables occurring. This formula is denoted by:

P(X=r) = nCr × p^r × q^n-r

Where:

n = number of sampled variable which in this case = 21

r = variable outcome being determined which in this case = 5

p = probability of success of the variable which in this case = 0.31

q= 1- p = 1 - 0.31 = 0.69

P(X=5) = 21C5 × 0.31^5 × 0.69^16

P(X=5) = 0.0241

4 0
3 years ago
Solve using distributive property 6 x 4.4
user100 [1]
26.4 just multiply 6 * 4.4 and that would be the answer!
4 0
3 years ago
if a birds elevation is 28 meters above the surface and a fish is -12 meters below how far apart are they
timama [110]
They are 40 meters apart
3 0
3 years ago
Read 2 more answers
Which of the following facts, if true, would allow you to prove that lines l and m are parallel? NEED HELP
Damm [24]

Two parallel lines A and B are crossed by another line as shown in the attached figure. Angle 2 and 3 are equal, because they are opposite angles, while angle 3 and 7 are also equal, because they are corresponding angles, thus it is deduced that

angle 2 = angle 3

angle 3 = angle 7

So angle 2 = angle 7

<span>Hence fourth option is right.</span>

8 0
3 years ago
HEY GUYS I NEED HELP WITH THIS PLZZ! write down everything from the detail of how yall found ur answer plzz! 20 points or more..
aleksley [76]

Answer:

1/6+1/8+$13.50+$5=x

x=$18.79

Step-by-step explanation:

i add them

first i find the common denominator for 1/6 and 1/8

then i add 13.50 by 5

then add 18.50 by 7/24

i hope this explains how i got my answer

5 0
3 years ago
Read 2 more answers
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