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Oxana [17]
3 years ago
10

If three prime numbers are randomly selected from the prime numbers less than 30 and no prime number can be chosen more than onc

e, What is the probability that sum of the three prime numbers selected will be even?
A) 10%
B) 27%
C) 30%
D) 36.5%
E) 42%
Mathematics
1 answer:
Leto [7]3 years ago
5 0

Answer:

  C)  30%

Step-by-step explanation:

The sum will be even if one of the primes chosen is even. There is only one even prime of the 10 primes under 30.

There are 9C2 = 36 ways to choose two odd primes from the 9 odd primes under 30, so 36 ways to choose 3 primes whose total is even. There are 10C3 = 120 ways to choose 3 primes, so the probability that 3 randomly chosen primes under 30 will have an even sum is ...

  36/120 = 0.30 = 30%

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What is the length of a 50-inch TV that has a width of 27 inches?
drek231 [11]

Answer:

42.08inches

Step-by-step explanation:

Given data

SIze of TV= 50 inch

Width= 27inches

Length= ??

Applying Pythagoras theorem

z^2= x^2+y^2

50^2=  x^2+27^2

square root both sides

50^2= x^2+27^2

2500= x^2+ 729

2500-729=x^2

1771=x^2

x= √1771

x= 42.08

Hence the lenght is 42.08inches

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Hatshy [7]

Answer:

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Step-by-step explanation:

Given that after 1 hour of work, Jack will make 18 dollars and the slope is 10, subtract 10 dollars from 18 dollars to find his set amount, or y-intercept.

18 - 10 = 8 dollars.

Now that we have the m and b values, we can create our equation.

The equation in standard form is f(x) = mx +b, where m = the slope and b = the y-intercept. Plug our values in and the equation will be f(x) = 10x + 8. You can test if this is correct by plugging in x values from the table and seeing if your calculated value correctly corresponds to the given y value in the table.

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3 years ago
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Dafna1 [17]
Uhmmmmmmm..... Im pretty sure its A. If my statement is correct then please mark the brainiest!

I hope this helps!
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morpeh [17]
2/12 1/12 i hope this is clear
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soldi70 [24.7K]

Answer:

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Step-by-step explanation:

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10 x 20= 200 then you get the 200 and times it by 4 so 200 x 4 = 800

hope this helps!

6 0
3 years ago
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