Question 1192984
yellow is first with probability 1/7
white is second with probability 1/6, this order 1/42
pink is not third with 4/5
not fourth with 3/4
not fifth with 2/3
not sixth with 1/2
seventh with probability 1
so the probability of pink's being last is (1/42)(4/5)(3/4)(2/3)(1/2)=24/5040=0.00476