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antoniya [11.8K]
3 years ago
7

Simplify 1/3(9a+b)-1/2(4a+2b)

Mathematics
2 answers:
Aleksandr-060686 [28]3 years ago
8 0
1/3(9a+b) - 1/2(4a+2b) = (1/3)(9a+b) - (1/2)(4a+2b)
                                     = (1/3).9a + (1/3)b - [(1/2).4a + (1/2).2b]
                                     = 3a + b/3 - 2a - b
                                     = a + (1/3 - 1)b
                                     = a - (2/3)b
d1i1m1o1n [39]3 years ago
6 0
1/3 x 9a then 1/3 x n plus -1/2 x 4a the -1/2 x 2b the add the two b's together then add the two a'S together the write _a + _b
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Answer:

a) 0.0002

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Step-by-step explanation:

Lets start by stating the probabilities of a person belonging to each policy:

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Ultra- Preferred: 0.2

The probability of person belonging to each policy AND dying in the next year:

Standard: 0.3 x 0.015 = 0.0045

Preferred: 0.5 x 0.002 = 0.001

Ultra- Preferred: 0.2 x 0.001 = 0.0002

a) The probability a ultra - preferred policy holder dies in the next year is 0.001. To find the probability of a person being both a ultra - preferred policy holder AND die in the next year is: 0.001 x 0.2= 0.0002

b)  The probability is given by adding the probabilities calculated before :

0.0045 + 0.001 + 0.0002 = 0.0057

c) We use the results above again. This is 0.0002 / (0.001 + 0.0045). The answer comes out to be 0.0364

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Olenka [21]

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2 years ago
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alexgriva [62]

Answer:

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Step-by-step explanation:

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