From a pack of 52 playing cards Jacks, queens, kings and aces of red colour are removed. From the remaining, a card is drawn at random. Find the probability that the card drawn is :  a black queen     (ii)  a red card   (iii)  a black jack

Explanation

Let the speed of a train =x k m / h r

And the speed of a car =y {km} {hr}

Total distance travelled =600 {km}

Given here , If he covers 400 {km} by train and rest by car i.e.
(600-400)

=200 {km}

Time taken =6 {hrs} 30 {min}=6+frac{30}{60}=6.5 {hrs}

If he travels 200 {km} by train and rest by car i.e. (600-200)
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