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Bumek [7]
2 years ago
14

A batch of 50 parts contains six defects. If two parts are drawn randomly one at a time without replacement, what is the probabi

lity that both parts are defective?
Mathematics
1 answer:
Marrrta [24]2 years ago
7 0

we know that

P(both parts defective) = P(1st is defective) * P(2nd is defective)  

Probability of 1st detective:

total parts =50

number of defects =6

so,

P(1st is defective)

=\frac{6}{50}

Probability of 2nd detective:

total parts =49

number of defects =5

so,

P(2nd is defective)

=\frac{5}{49}

Probability of both detective:

P(both parts defective) is

=\frac{6}{50} *\frac{5}{49}

=\frac{3}{245}...............Answer

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labwork [276]
This is called the Pythagorean theorem : a ² + b ² = c ². You can substitute any of the variable with any of the known numbers and then you all you have to do is isolate the variable. I hope that helps!!
4 0
3 years ago
A father is 60 years old just son is half his age how old was the boy when his father was four times his age
gayaneshka [121]

So, what you would have to do is figure out how old he is not which is 30 yrs old because it is half of 60.

So, after this you would have to find a number that would go into 60 four times which is 15.

So, your answer would be 15.


HOPES THIS HELPS!!!!

6 0
3 years ago
Can someone help me??
Elodia [21]
The first one is additive
the second one is additive
the third one is multiplicative
the last one is multiplicative
4 0
2 years ago
H=7+44t-16^2
djyliett [7]

Answer:

t_1\approx2.18

t_2\approx0.57

Step-by-step explanation:

h=7+44t-16t^2

27=7+44t-16t^2

0=-20+44t-16t^2

0=-16t^2+44t-20

t=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

t=\frac{-44\pm\sqrt{44^2-4(-16)(-20)}}{2(-16)}

t=\frac{-44\pm\sqrt{1936-1280}}{-32}

t=\frac{-44\pm\sqrt{656}}{-32}

t=\frac{-44\pm4\sqrt{41}}{-32}

t=\frac{11}{8}\pm\frac{\sqrt{41}}{8}

t_1\approx2.18

t_2\approx0.57

5 0
2 years ago
Tina is plant a garden with the area of 25 square feet what could the length and width of her garden be
Andreyy89
Length=5 (each side)
width=5 (each side)
4 0
3 years ago
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