If (a, b) is the centre and c is the radius of the circle x² + y² + 2x + 6y + 1 = 0, then what is the value of a² + b² + c²?

Two dice each numbered from 1 to 6 are thrown together. Let A and B…

An urn contains one black ball and one green ball. A second urn contains one…

What is the most probable number of successes in 10 trials with probability of success…

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