15 pencils - £1.20
£3.80 left
12 rulers - £3.60
20p left
2 pencils - 16p
17 pencils, 12 rulers
7/3 and 9/2
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1/12 or decimal form 0.083 with repeating line
Lets take away 2 white chips...
8 black and 4 white...total of 12 chips
P(black) = 8/12 = 2/3
remove 2 white chips <==
Answer:

Step-by-step explanation:
Solve for the value of
:

-Multiply both sides by 


So, therefore, value of
is
.