Calculate the probability, Mathematics

Assignment Help:

Calculate the Probability

A bag contains 80 balls of such 20 are red, 25 are blue and 35 are white.  A ball is picked at random what is the probability that the ball picked is as:

(i)  Red ball

(ii) Black ball

(iii) Red or Blue ball.

Solution

(i) Probability of a red ball = number of red ball in the bag/total balls in the bag

= P(R)

= 20/80

= 1/4

(ii) Probability of black ball =  number of red ball in the bag/total balls in the bag

= P (B)

= 0/80

= 0 

(iii) P(R or B) = 20/80 or 25/80 = 20/80 + 25/80

=  9/16

Note: in probability or is replaced by a plus (+) sign.  Look addition rule.


Related Discussions:- Calculate the probability

Partial Differential Equation, Determine the minimum capacity C of a Capaci...

Determine the minimum capacity C of a Capacitor given that: C =(ax/(x-a))+(xy/(y-b))+(yb/(b-y)) given that "a" and "b" are fixed values and "x" and "y" vary independently such th

Probablility, #question.find the number of combinations of the letters a, b...

#question.find the number of combinations of the letters a, b, c, and d taken 3 at a time.

Profit and loss, a shopkeeper buys two cameras at the same price . he sells...

a shopkeeper buys two cameras at the same price . he sells one camera at a profit of 18% and the other at a price of 10% less than the selling price of the first camera. find his p

Algebra, sir i want to ask u a question and that is if we simplify this wha...

sir i want to ask u a question and that is if we simplify this what will be the answer.(9x-45z+6y-100z+5x)

Permatuation and combination problem, A,B,C are natural numbers and are in ...

A,B,C are natural numbers and are in arithmetic progressions and a+b+c=21.then find the possible values for a,b,c Solution) a+b+c=21 a+c=2b 3b=21 b=7 a can be 1,2,3,4,5,6 c c

Discret math, i have a question about discret math

i have a question about discret math

Division, how do you turn 91 divided by730 into a compatible number

how do you turn 91 divided by730 into a compatible number

Elliptic paraboloid - three dimensional spaces, Elliptic Paraboloid Th...

Elliptic Paraboloid The equation which is given here is the equation of an elliptic paraboloid. x 2 /a 2 + y 2 /b 2 = z/c Like with cylinders this has a cross section

Integraton, how to find area under a curve

how to find area under a curve

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