Home › JEE Advanced › Mathematics › Statistics and Probability › A box has 6 balls, 4 are red. Two balls drawn (w…
A box has 6 balls, 4 are red. Two balls drawn (without replacement). P(both red):
A1/15
B1/2
CC(4,2)/C(6,2) = 6/15 = 2/5
D1/3
Answer & Solution
Correct answer: C. C(4,2)/C(6,2) = 6/15 = 2/5
P(both red) = 4C2 / 6C2 = 6/15 = 2/5 = 0.4.
Related questions
Dispersion is measured on the basis of the observations and the:Comparing series measured in different units needs a measure independent of:Which of these is NOT a measure of central tendency?For grouped data, standard deviation is found by replacing each class by its:A series with the lesser coefficient of variation is more:A series with the greater coefficient of variation is more:The coefficient of variation requires that the mean is not:The coefficient of variation is which ratio times 100?