Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Probability question

2024 · 31 Jan · Shift 1 · Q38
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Mathematics
  4. /Probability
  5. /2024 · 31 Jan · Shift 1 · Q38

Probability question

2024 · 31 Jan · Shift 1 · Q38

JEE MainMathematicsProbabilityMCQ+4 / −1
Three rotten apples are accidently mixed with fifteen good apples. Assuming the random variable xxx to be the number of rotten apples in a draw of two apples, the variance of xxx is
  1. A
    57153\frac{57}{153}15357​
  2. B
    40153\frac{40}{153}15340​
  3. C
    37153\frac{37}{153}15337​
  4. D
    47153\frac{47}{153}15347​
PreviousNext

More from Probability

  • Two marbles are drawn in succession from a box containing 10 red, 30 white, 20 blue and 15 orange marbles, with replacement being made after each drawing. Then the probability, that first drawn marble is red and second drawn marble is…2024 · MCQ
  • A coin is biased so that a head is twice as likely to occur as a tail. If the coin is tossed 3 times, then the probability of getting two tails and one head is2024 · MCQ
  • Two dice are thrown independently. Let A be the event that the number appeared on the 1st  die is less than the number appeared on the 2nd  die, B be the event that the number appeared on the…2023 · MCQ
  • Three dice are rolled. If the probability of getting different numbers on the three dice is qp​, where p and q are co-prime, then q−p is equal to :2023 · MCQ
  • In a bolt factory, machines A,B and C manufacture respectively 20%,30% and 50% of the total bolts. Of their output 3, 4 and 2 percent are respectively defective bolts. A bolt is drawn at random from the product. If the bolt…2023 · MCQ
  • If the probability that the random variable X takes values x is given by P(X=x)=k(x+1)3−x,x=0,1,2,3,…, where k is a constant, then P(X≥2) is equal…2023 · MCQ
  • Let N denote the sum of the numbers obtained when two dice are rolled. If the probability that 2N<N! is nm​, where m and n are coprime, then 4m−3n is equal to :2023 · MCQ
  • Let S={M=[aij​],aij​∈{0,1,2},1≤i,j≤2} be a sample space and A={M∈S:M is invertible } be an event. Then P(A) is equal to :2023 · MCQ