Sara has two boxes. There are 6 black and 4 white in Box A. There are 7 black and 3 white counters in Box B.
Sara takes at random a counter from box A and puts it in Box B.
She then takes at random a counter from box B and puts it in Box A.

Using a probability tree diagram, find the probability that after Sara has put the counters from Box B into Box A there will still be 6 black counters and 4 white counters in Box A.

(Note: Please just don't give the answer straight to me, please include explaining and step by step guide to how to get the answer.)

Thank You

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First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )

Wish i could u but i just don’t know the answer