Why the petals of a flower are red in somewhere, yellow in somewhere, purple in somewhere or blue in some place else?

Why does table salt, some times appear yellow in colour?

Number of permutations of 1, 2, 3, 4, 5, 6, 7, 8, and 9 taken all at a time are such that the digit 1 appearing somewhere to the left of 2 3 appearing to the left of 4 and 5 somewhere to the left of 6, is kxx7! Then the value of k is _________.

Three faces of a fair dice are yellow, two are red and one is blue. Find the probability that the dice shows (a) yellow, (b) red and (c ) blue face.

[A] : Bees are colour-blind for red and are fond of yellow, violet and purple. [R] : Normally only one pollen tube develops from a pollen grain.

You are given four sources of light each one providing a light of single colour - red, blue, green and yellow, Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90^(@) . Which of the following statement is correct if the source of yellow light is replaced with other lights without changing the angle of incidence?

A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball is double that of a red ball, determine the number of blue balls in the bag.

Three faces of a fair die are yellow, two faces red and one blue. The die is tossed three times. Find the probability that the colours yellow, red and blue appear in the 1st, 2nd and the 3rd tosses respectively.

Number of permutations of 1,2,3,4,5,6,7,8 , and 9 taken all at a time are such that digit 1 appearing somewhere to the left of 2 and digit 3 appearing to the left of 4 and digit 5 somewhere to the left of 6 , is (e.g. 815723946 would be one such permutation)

A bag contains 9 discs of which 4 are red, 3 are blue and 2 are yellow. The disce are similar in shape and size. A disc is drawn at rendom from the bag. Calculate the probability that it will be (i) red, (ii) yellow, (iii) blue, (iv) not blue, (v) either red or blue.

Describe why a Four O'clock with pink flower are produced when a plant with red flower is crossed with a plant with a white flower.