Question
Five squares of a chessboard are chosen at random, the
probability that three are of one colour and two of another isSolution
5 squares on a chessboard can be chosen in 64C5 ways Three squares of one colour and two squares of different colour can be chosen in two mutually exclusive ways (i) 3 white and 2 black (ii) 3 black and 2 white Thus, the favourable number of cases = 32C3 × 32C2 + 32C2 × 32C3 = 2 × 32C2 × 32C3 Required Probability = 2 × 32C2 × 32C3 / 64C5
Phosphorus uptake in alkali soil is in the form of _____
Lumpi-Pro VacInd, a vaccine for Lumpy disease of cattle has been developed by ____
E-nam was launched in which year
The rearing of young bee to replace the old queen bee is
Which one of the following is used in organic farming to prevent weed germination & growth?
What is the recommended fluoride concentration in drinking water to protect teeth against decay?
The rise in water-table in any season may be a ______ phenomenon of a short duration.
Oil content (%) present in groundnut.
Insects with separate male and female individuals are referred to as:
Fluchloralin & Trichloralin are examples of:
