Find out the mean time, Mathematics

Assignment Help:

1. The probability that a couple will have a child with black hair is 0.6.

If this couple has 7 children what is

(a) the probability that exactly 3 of these children have black hair ?

(b) the probability that no more than 2 of their children have black hair ?

(c) the probability that none of the children have black hair

(d) what is the mean number of their children that have black hair and what is the variance ?

2. The service life of an incandescent light bulbs used domestically was investigated.

It was found that a light bulb can last up to 3 years, and the probability distribution of the number of years a light bulb was used before failure is given below:

 (i) What is the mean service life of a light bulb?

(ii) What is the variance and standard deviation of a service life of a light bulb?

 


Related Discussions:- Find out the mean time

Simultaneous equations by substitution, Simultaneous equations by substitut...

Simultaneous equations by substitution: Solve the subsequent simultaneous equations by substitution. 3x + 4y = 6      5x + 3y = -1 Solution: Solve for x: 3x = 6

Frequency polygon, how to compute the frequncy polygon of the scores?

how to compute the frequncy polygon of the scores?

What is fibonacci sequence, what is Fibonacci Sequence? The most famous...

what is Fibonacci Sequence? The most famous sequence in mathematical history is called the Fibonacci sequence, discovered by the 12th-century mathematician Leonardo Fibonacci o

Shares and dividend, a man in rested rupee 800 is buying rupee 5 shares and...

a man in rested rupee 800 is buying rupee 5 shares and then are selling at premium of rupee 1.15. He sells all the shares.find profit

Wave through the origin always has a slope of one or not, Can you explain t...

Can you explain that a wave through the origin always has a slope of one or not?

Word problem, adison earned $25 mowing her neighbor''s lawn. then she loane...

adison earned $25 mowing her neighbor''s lawn. then she loaned her friend $18, and got $50 from her grandmother for her birthday. she now has $86. how much money did adison have to

Volume of solids, find the volume of a rectangular based right pyramid with...

find the volume of a rectangular based right pyramid with its base 18 cm by 24 cm and the slanted edge 39 cm

Decision theory, DECISION THEORY People constantly make decision...

DECISION THEORY People constantly make decisions in their private lives as well as in their work. Some decisions are qualitative in terms of their implications and signi

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd