Question
A three-letter word is to be formed such that the first
and last letters are consonants and the middle letter is a vowel. How many such words can be formed?Solution
ATQ, Number of ways to choose the first letter (consonant) 21C1 = 21 Number of ways to choose the second letter (vowel) = 5C1 = 5 Number of ways to choose the third letter (different vowel) = 21C1 = 21 (Since it must be different from the first vowel) Hence total number of ways = 21 × 5 × 21 = 2205 ways
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 metal is liquid at room temperature? Â
'Shock-absorbers are usually made of steel as it –
A cylindrical conductor of length L and radius R has its radius increasing linearly from R at one end to 2R at the other. A constant current I flows thr...
Which of the following statement is correct?
I. The incident ray, the normal at the point of incidence and the reflected ray all lie in the sa...
What is the speed of sound in air at room temperature (20°C)? Â
In a charged conductor, where do the electrical charges tend to reside?
What is the minimum escape velocity of rocket to be launched into space?
The point where the total mass of a body is considered to be concentrated is known as what?
What is the function of a fuse in an electric circuit? Â
Relevant for Exams:
