Anna is participating in a trivia game with 6 questions, each with 3 choices. Only one choice is correct per question. If Anna guesses on all questions, what is the probability that she gets exactly 3 correct?
ATQ, Probability of a correct guess = 1/3 Probability of an incorrect guess = 2/3 Number of ways to choose 3 correct answers out of 6 = (6/3) = 20 So, the required probability = 20 × (1/3)3 × (2/3)3 = (20×1×8)/(27×27) = 160/729
The process involved in making soap is
In circular motion the direction of velocity changes at _______ points.
The refractive index of glass is 1.5. What is the speed of light in glass?
(Speed of light in vacuum is 3.0 ×108 m s-1)
When a forward bias is applied to a p-n junction, it
Consider the following two statements
(A) Kirchhoff's junction law follows from the conservation of charge.
(B) Kirchhoff's loop law follo...
Which law explains why it is difficult to hammer a nail into a freely suspended wooden frame?
In AC circuits, AC meters measure –
When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance?
Which law describes the relationship between the force applied to a spring and its extension or compression?
A sound with a single frequency is called a:
