Alexa has read 3/8 chapters, while Rose has read 3/6, or 1/2, meaning that Rose has read more pages than Alexa.
B + 1.1 = -11
Subtract 1.1 from both sides to get b.
So, b = -12.1
2 to the power of 20/3 to the power of 8. 2^20/3^8 for short.
Number of ways of picking a smaller number out of a bigger number is called combination.
Number of way of picking 3 stamps out of 4 is 4C3 (4 combination 3) = 4! / (3! x (4 - 3)!) = 4! / (3! x 1!) = (4 x 3 x 2 x 1) / (3 x 2 x 1 x 1) = 24 / 6 = 4 ways.
