Advertisements
Advertisements
Question
A bag contains 12 blue balls and x red balls. If one ball is drawn at random what is the probability that it will be a red ball?
Solution
Sample space = 12 + x
n(S) = x + 12
Let A be the event of getting a red ball
n(A) = x
P(A) = `("n"("A"))/("n"("S"))`
= `(x/(x + 12))`
APPEARS IN
RELATED QUESTIONS
Write the sample space for tossing three coins using tree diagram
Two unbiased dice are rolled once. Find the probability of getting a doublet (equal numbers on both dice)
Two unbiased dice are rolled once. Find the probability of getting the sum as a prime number
Two unbiased dice are rolled once. Find the probability of getting the sum as 1
A bag contains 5 red balls, 6 white balls, 7 green balls, 8 black balls. One ball is drawn at random from the bag. Find the probability that the ball drawn is not white
The king and queen of diamonds, queen and jack of hearts, jack and king of spades are removed from a deck of 52 playing cards and then well shuffled. Now one card is drawn at random from the remaining cards. Determine the probability that the card is a queen of red card
Two customers Priya and Amuthan are visiting a particular shop in the same week (Monday to Saturday). Each is equally likely to visit the shop on any one day as on another day. What is the probability that both will visit the shop on the same day?
The probability a red marble selected at random from a jar containing p red, q blue and r green marbles is
A purse contains 10 notes of ₹ 2000, 15 notes of ₹ 500, and 25 notes of ₹ 200. One note is drawn at random. What is the probability that the note is either a ₹ 500 note or ₹ 200 note?
A bag contains 5 white and some black balls. If the probability of drawing a black ball from the bag is twice the probability of drawing a white ball then find the number of black balls.
