

What is sum of all rearrangements of the 4-digit number 3214?
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What is sum of all rearrangements of the 4-digit number 3321?
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Of 22 points on a plane, 8 are on a straight line, 7 are on another straight line and 10 are on a third straight line. How many triangles can be drawn by connecting some three points from these 22?
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A bag contains 4 red and 3 black balls. A second bag contains 2 red and 3 black balls. One bag is selected at random. If from the selected bag one ball is drawn, then what is the probability that the ball drawn is red?
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In how many ways can we rearrange the letters of the word MANANA such that no two A’s are adjacent to each other?
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