SOLUTION: There are 25 pens in a packet. 7 of the pens are green. 10 of the pens are black. The rest of the pens are red. Jurgen takes at random a pen from the packet. (a) Find the probabi

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: There are 25 pens in a packet. 7 of the pens are green. 10 of the pens are black. The rest of the pens are red. Jurgen takes at random a pen from the packet. (a) Find the probabi      Log On


   

Question 1181510: There are 25 pens in a packet. 7 of the pens are green. 10 of the pens are black. The rest of the pens are red. Jurgen takes at random a pen from the packet.
(a) Find the probability that
(i) the pen is black
(ii) the pen is red
Answer by ikleyn(52798) About Me  (Show Source):
You can put this solution on YOUR website!
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(a)  P = 10%2F25 = 2%2F5 = 0.4 = 40%.     ANSWER


(b)  P = %2825+-+7+-+10%29%2F25 = 8%2F25 = 32%2F100 = 0.32 = 32%.    ANSWER

Solved.