A plane ticket to barcelona costs £175

Mathematics

1 answer:

Digiron [165]3 years ago

4 0

Answer: £164.50 i think soooo

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

Dmitry [639]

Answer:

C)30%

Step-by-step explanation:

Prime numbers less than 30 are given below

2,3,5,7,11,13,17,19,23,29

We have to find the probability that sum of three prime numbers selected will be even.

We know that

Sum of any three prime number except 2 will be odd.

Total prime numbers except 2=9

Total prime numbers=10

Probability:P(E)= $\frac{favorable\;cases}{total\;number\;of\;cases}$

Probability of getting sum of three prime numbers selected will be odd= $\frac{9C_3}{10C_3}$

$nC_r=\frac{n!}{r!(n-r)!}$

By using formula

Probability of getting sum of three prime numbers selected will be odd=P(E)= $\frac{\frac{9!}{3!6!}}{\frac{10!}{3!7!}}=\frac{9!}{3!6!}\times \frac{3!\times 7\times 6!}{10\times 9!}$

Probability of getting sum of three prime numbers selected will be odd=P(E)= $0.7$

Probability of getting sum of three prime numbers selected will be even=P(E')=1-0.7=0.3= $0.3\times 100=30$ %

By using formula P(E')=1-P(E)

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3 years ago

(Easy) What changes about a figure after translation in terms of 2D shapes?

Lapatulllka [165]

It really does not change a whole lot, all your doing is moving it, your not adding size or subtracting size or rotating it. Just make all the points of the shape stay the same distance.

I hope this helps.

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3 years ago

23 710,23 751 23 715. least yo greatest

Basile [38]

#1 23,710 #2 23,715 #3 23,751

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4 years ago

Figure ABCD is a parallelogram.

Eddi Din [679]

Answer:

stack AD with bar on top space text is parallel to end text BC with bar on top.

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