Advertisements
Advertisements
प्रश्न
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
उत्तर
Sample space (S) = 5 + 6 + 7 + 8
n(S) = 26
Let A be the event of getting a white ball
n(A) = 6
P(A) = `("n"("A"))/("n"("B")) = 6/26 = 3/13` ....(1)
Not white probability of getting white ball
P(A) = `3/13` .......(from (1))
Probability of not getting white ball `"P"(bar"A")` = 1 – P(A)
= `1 - 3/13 = (13 - 3)/13 = 10/13`
APPEARS IN
संबंधित प्रश्न
If A is an event of a random experiment such that `"P"("A"):"P"(bar"A")` = 17 : 15 and n(S) = 640 then find `"P"(bar"A")`
A bag contains 12 blue balls and x red balls. If one ball is drawn at random if 8 more red balls are put in the bag, and if the probability of drawing a red ball will be twice that it will be a red ball, then find x.
Two unbiased dice are rolled once. Find the probability of getting the sum as a prime number
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 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
Some boys are playing a game, in which the stone thrown by them landing in a circular region is considered as win and landing other than the circular region is considered as a loss. What is the probability to win the game? (π = 3.14)
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 different days?
The probability a red marble selected at random from a jar containing p red, q blue and r green marbles is
If a letter is chosen at random from the English alphabets {a, b, …, z}, then the probability that the letter chosen precedes x
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.
