Question
If a lens forms an image of magnification -2, what is
the nature of the image?Solution
Negative magnification indicates a real and inverted image. Magnitude > 1 indicates enlarged image.
Find the number of ways to arrange each letter of the word 'EDUCATIONAL' such that all the vowels always come together.
Find the no. of words formed by using all the letter of the word DISCOUNT, so that the vowels are never together?
How many 4-digit numbers can be formed using digits 1–9 if repetition is not allowed and the number is even?
In a party 19 persons shake hands with every other person. Find the total no of handshakes in the party?
How many numbers of five digits may be formed with the digits 7, 2, 0, 0, and 1?
How many 4-digit even numbers can be formed using digits 1, 2, 3, 4, 5, 6 without repetition?
In how ways can the selection be made so that a particular member is always included?
...- In how many ways can you arrange 3 identical cubes, 2 identical pens, and 1 ball such that all 3 cubes are not together?
From 6 officers and 8 Jawans, in how many ways can 5 be chosen to include exactly 3 officers?
How many five digit numbers can be formed using the digits 0, 1, 2, 3, 4 and 5 which are divisible by 5, without repeating the digits?
Relevant for Exams:
