For what value of λ are the vectors λi + (1 + λ)j + (1 + 2λ)k and (1 – λ)i + λj + 2k perpendicular ? - NDA Mathematics 2014 (II)

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…

For what value of λ are the vectors λi + (1 + λ)j + (1 + 2λ)k and (1 – λ)i + λj + 2k perpendicular ?