Probability

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Q 1. When {tex}3{/tex} fair dice are thrown what is the probabillity the sum of the numbers is more than or equal to {tex} 6 ? {/tex}

{tex} \frac { 103 } { 216 } {/tex}

{tex} \frac { 103 } { 108 } {/tex}

{tex} \frac { 47 } { 216 } {/tex}

None of these

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Q 2. Two coins are such that the first has a tail and a head and the second has both heads. One of these coins is tossed and the result is a head. What is the probability that it is the coin with {tex} 2 {/tex} heads?

{tex} \frac { 1 } { 2 } {/tex}

{tex} \frac { 1 } { 3 } {/tex}

{tex} \frac { 2 } { 3 } {/tex}

{tex} \frac { 2 } { 7 } {/tex}

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