There are 7 yellow, 6 blue, 5 red, 4 green, and 3 orange balls inside a box. Without looking, write and describe the probability of picking a:
(a) yellow
(b) violet
(c) blue
(d) blue or yellow
(e) yellow, blue, red, or green
(a) yellow
(b) violet
(c) blue
(d) blue or yellow
(e) yellow, blue, red, or green
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Solution:
(a) There are 7 yellow balls. [tex] \frac{7}{25} = 28\% [/tex]
(b) There are no violet colored balls. [tex] \frac{0}{25} = 0\% [/tex]
(c) There are 6 blue balls. [tex] \frac{6}{25} = 24\% [/tex]
(d) There are 6 blue balls and 7 yellow balls. [tex] \frac{6+7}{25} = \frac{13}{25} = 52\% [/tex]
(e) There are 7 yellow, 6 blue, 5 red and 4 green balls. [tex] \frac{7+6+5+4}{25} = \frac{22}{25} = 88\% [/tex]