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Explanation: - Pyramid of Number can be upright (grassland ecosystem) or inverted (forest ecosystem). - Pyramid of Biomass can be upright (terrestrial ecosystem) or inverted (aquatic ecosystem). Thus, both Pyramid of Number and Pyramid of Biomass show upright and inverted types.
Coupons numbered 1 to 10 are shuffled and one is drawn what is the probability that it bears an odd number which is also a multiple of 3?
What is the probability that the cards drawn contains exactly 2 purple card?
A bag contains 14 Green and 16 Red balls. One ball is drawn at random. What is the probability that the ball drawn is Red?