2 years ago

Which interval is the solution set to 0.35x – 4.8 < 5.2 – 0.9x?

Mathematics

1 answer:

alexdok [17]2 years ago

8 0

Answer: the answer is b . negative Infinity infinity and positive 8

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<u>There are:</u>

6 red balls - R
5 black balls - B
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<h3>A. Without replacement</h3>

i. <u>Two blacks </u>

P(BB) = 5/11*4/10 = 2/11

ii. <u>The first is black</u>

P(B) = 5/11

or, alternatively

P(BR or BB) = 5/11*6/10 + 2/11 = 3/11 + 2/11 = 5/11

iii. <u>Both are of same colour</u>

P(BB or RR) = 2/11 + 6/11*5/10 = 2/11 + 3/11 = 5/11

<h3>B. With replacement</h3>

i. <u>Two blacks </u>

P(BB) = 5/11*5/11 = 25/121

ii. <u>The first is black</u>

P(B) = 5/11

or alternatively

P(BR or BB) = 5/11*6/11 + 25/121 = 30/121 + 25/121 = 55/121 = 5/11

iii. <u>Both are of same colour</u>

P(BB or RR) = 5/11*5/11 + 6/11*6/11 = 25/121 + 36/121 = 61/121

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