How many white marbles does the jar contain? , Mathematics

Assignment Help:

A jar contains 54 marbles each of which is blue , green or white. The probability of selecting a blue marble at random from the jar is 1/3  and the probability of selecting a green marble at random is 4/9 . How many white marbles does the jar contain?                                                                                               (Ans:12)

Ans: Let there be b blue, g green and w white marbles in the marbles in the jar. Then, b + g + w = 54

∴ P (Selecting a blue marble) =     b/54

It is given that the probability of selecting a blue marble is 1/3 .

∴ 1/3 =  b/54  => b = 18

We have,

P(Selecting a green marble) = 4/9

=>  g/54  = 4/9

[Q P (Selecting a green marble) = 4/9 (Given)]

=> g = 24

Substituting the values of b and g in (i), we get

18 + 24 + w = 54 => w = 12


Related Discussions:- How many white marbles does the jar contain?

Find the instantaneous rate, The time t required to test a computer memor...

The time t required to test a computer memory unit is directly proportional to the square of the number n of memory cells in the unit. For a particular type of unit, n = 6400

Integers, Whats some negative integers that equal 36

Whats some negative integers that equal 36

value of integration , what is the value of integration limit n-> infinity...

what is the value of integration limit n-> infinity [n!/n to the power n]to the power 1/n Solution)  limit n-->inf.    [1 + (n!-n^n)/n^n]^1/n = e^ limit n-->inf.    {(n!-n^n)

Arc length - applications of integrals, Arc Length - Applications of integr...

Arc Length - Applications of integrals In this part we are going to look at determining the arc length of a function.  As it's sufficiently easy to derive the formulas that we'

Postage stamp problem, Explain Postage Stamp Problem solving tehcnique? Wha...

Explain Postage Stamp Problem solving tehcnique? What is Postage Stamp Problem?

Demerits and merit-the median, The median Merits i.  This shows t...

The median Merits i.  This shows the centre of a described set of data ii.  Knowledge of the determination of the median may be extended to find out the quartiles i

Derive the marshalian demand functions, (a) Derive the Marshalian demand fu...

(a) Derive the Marshalian demand functions for the following utility function: u(x 1 ,x 2 ,x 3 ) = x 1 + δ ln(x 2 )       x 1 ≥ 0, x 2 ≥ 0 Does one need to consider the is

What is dividing fractions, What is Dividing Fractions? If you want to ...

What is Dividing Fractions? If you want to divide two fractions, you invert the second fraction (that is, turn it upside-down) and change the division sign to a multiplication

Assignment help, How do get help with my work? should i just type it in thi...

How do get help with my work? should i just type it in this box...? sorry thanks!

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