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Porifera have no true tissues or organs, and obtain nutrients through filter feeding.
A box contains 2 blue, 3 black and 5 orange balls. In how many ways can 3 balls be drawn from the box, if at least 1 black ball is to be included in the...
In a group of 5 boys and 4 girls, 5 students have to be selected. In how many ways it can be done so that only 2 boys are included.
How many 6-digit numbers can be formed from the digits 0,3,4,5,6 and 8, in which the digits are not repeated?
In how many different ways can the letters of the word “INCORPORATION” be arranged so that the vowels comes together?
From a group of 10 men and 7 women, in how many ways can 8 men and 4 women be selected?
Among a set of 4 black balls and 3 white balls, how many selections of 3 balls can be made such that at least 2 of them are black balls?
In how many ways can a group of 2 boys and 2 girls be made out of a total of 6 boys and 4 girls?
11 people decided to spend an afternoon in two groups. A group of them decided to go to the theater and the remaining decided to play tennis. In how man...
A letter is randomly selected from the word "DETACHMENT." What is the probability that the selected letter is a vowel?
In how many different ways can the letter of the word CHESTNUT is arranged so that vowels always occur together?
