exam Maths Puzzle Numerical Ability

two complementary angles have degree measures p and 3p-6

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exam Other Question

Staples recently sold a black apple stylewriter II ink cartridge for $30.86 and a black HP Designjet 10PS cartridge for $43.58. At the start of a recent fall semester, a total of Ten identical cards were marked, each with a different number from 0 to 9. The cards were turned face down and shuffled. Mary was asked to pick a card. Find the probability that she picked a number less than 4.