Mathematics, 26.02.2021 14:30 danielahumajova6

A bag contains x counters. 7 of the counters are blue. Sam takes at random a counter from the bag and does not replace it. Jill then takes a counter from the bag. The probability they both take a blue counter is 0.2. Form an equation involving x, in the form x + bx +c=0.

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A bag contains x counters. 7 of the counters are blue. Sam takes at random a counter from the bag an...