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calculate how many times 8,9,10 will come when we throw 2 dice?

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TCS Other Question

3 persons A, B, C were there. A always says truth, B lies on monday, tuesday and wednesday but C lies on thrusday, friday & saturday. one day A said that B & C said to A, that B said yesterday was one of the days when I lies. C said that yesterday was one of the days when I lies too then which day was that?
a) Sunday
b) Thursday
c) Saturday
d) Tuesday
Which will give good standard deviation?

(a). 4,0,-4,0,4 (b) 4,-4,4,-4,4 (c) 4,4,4,4,4