With a coin, the chance of throwing a cross is 0.3 and the chance of throwing head is 0.25. Calculate the probability that you will get the same result twice if each coin is rolled once
strange coin!
result could be cross,cross or head,head
= (.3)(.3) + (.25)(.25) = ....
There is something fishy about this question and the coin.
A coin usually has 2 possibilities upon landing, heads or tails, or whatever
but the 2 probs must add up to 1, but .3 and .25 do not