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 ∴ n(A) = 26C2 , n(B) =4C2 , n(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+ 1/221+ 1/1326 = 55/221
When was the Udyam Khiladi Scheme launched by Pushkar Singh Dhami?
The Asian Development Bank (ADB) has entered a pact with the government of India to provide a loan of USD 250 million (around Rs 1,872 crore) for ______...
राजस्थान में सर्वाधिक सिंचाई की जाती है ?
What is the chemical name of Vitamin D ?
Which ministry launched the Humsafar Policy to facilitate better services on National Highways?
_____ is the capital of Hungary?
When was the first National Panchayati Raj Day observed in India?
Iodine is used to test the presence of ___________ in food.
Insider trading is the buying or selling of a security by someone who has access to material non-public information about the security.
Who commissioned the construction of the Martand Sun Temple in the eighth century CE?