Advertisements
Advertisements
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 n(A)
उत्तर
`"P"(bar"A") = 15/32`
1 − P(A) = `15/32`
⇒ ∴ P(A) = `1 - 15/32`
= `(32 - 15)/32`
= `17/32`
P(A) = `("n"("A"))/("n"("S")) = 17/32`
⇒ `("n"("A"))/640 = 17/32` ..[Given n(S) = 640]
32 n(A) = 17 × 640
n(A) = `(17 xx 640)/32`
= 17× 20
⇒ n(A) = 340
APPEARS IN
संबंधित प्रश्न
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)
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 black or red
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 clavor
Which of the following is incorrect?
The probability a red marble selected at random from a jar containing p red, q blue and r green marbles is
The probability of getting a job for a person is `x/3`. If the probability of not getting the job is `2/3` then the value of x 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.
