For any vector ~r, what is (~r ·î)(~r ×î) + (~r ·ĵ)(~r ×ĵ) + (~r ·k̂)(~r ×k̂) equal to?

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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