exam Maths Puzzle Numerical Ability

A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on 1-hour flight is 0.02. What is the probability that both will fail, neither will fail or one or the other will fail?

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exam Other Question
both sides of a parallelogram form angles of 21º and 34º with a diagonal, which measure 16cm. determine the length of the sides of the parallegram What does a equal is this parabolic equation?

Y= a(x-315)²+630