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Q1.

$A$ and $B$ toss a coin alternatively,the first to show a head being the winner. If $A$ starts the game,the chance of his winning is

(A)

$5/8$

(B)

$1/2$

(C)

$1/3$

(D)

$2/3$

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Q2.

$A$ determinant is chosen at random from the set of all determinants of order $2$ with elements $0$ or $1$ only. The probability that the determinant chosen is non-zero is

(A)

$\frac{3}{16}$

(B)

$\frac{3}{8}$

(C)

$\frac{1}{4}$

(D)

None of these

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