IBM Company Numerical Ability Probability

A man bets on number 16 on a roulette wheel 14 times and losses each time. On the 15th span he does a quick calculation and finds out that the number 12 had appeared twice in the 14 spans and is therefore, unable to decide whether to bet on 16 or 12 in the 15th span. Which will give him the best chance and what are the odds of winning on the bet that he takes?

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IBM Other Question

What is the probability that a two digit number selected at random will be a multiple of '3' and not a multiple of '5'? When two dice are thrown simultaneously, what is the probability that the sum of the two numbers that turn up is less than 11?