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find value of x A box contains 10 yellow, 6 green and x blue discs. One...

find value of x

A box contains 10 yellow, 6 green and x blue discs. One disc is drawn
at random from the bag and not replaced.
i. Write down an expression in x for the probability that the disc is green.
ii. If the probability of a green disc is 0.3, find the value of x.
iii. Another disc is then drawn from the box. Find the probability of that both discs
are the same colour.

Math   Advanced-Math   
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