Question
Two cards are drawn at random from a pack of 52 cards.
What is the probability that either both are black or both are queens?Solution
N(S) = 52C2 = 1326 Let A be the event of getting two Black cards And B be the event of getting two queens And (A∩B) be the event of getting two black queens ∴ P(A) = 26C2 , P(B) = 4C2 , P(A∩B) = 2C2 ∴ P(A) = 26C2 /52C2 , P(B)= 4C2/52C2 , P(A∩B) = 2C2/52C2 Required Probability = P(A) + P(B) - P(A∩B) = 26C2 /52C2 + 4C2/52C2 - 2C2/52C2 = 325/1326 + 6/1326 + 1/1326 = 330/1326= 55/221
Which insect pest primarily attacks cereal grains and cereal products during storage?
Whole Family Principle is a:
Which of the following statements is wrong with respect to MNREGA
1.   Legal guarantee for 100 days of employment
2.   The Zilla P...
Which one of the following mineral is the main source of Boron in soils
The extension work must be based on the interest of
Sand dunes are commonly seen in:
What is the name of the improved variety of the national flower Lotus launched by CSIR-National Botanical Research Institute?
What is the seed rate of hybrid cotton with a spacing of 120 × 60 cm?
Where is the Central Institute for Agriculture Engineering located?
According to Planning commission, Indian region is divided into how many agro climatic zones?
Relevant for Exams:
