SOLUTION: ___________ ___________ ____ |category|easy|difficult| |music||||0.2||0.15| |sport||||0.2||0.1| |history||0.1||0.05| |nature|||0.15|0.05| ___________ ___________ ___

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Question 400557: ____________________________
|category|easy|difficult|
|music||||0.2||0.15|
|sport||||0.2||0.1|
|history||0.1||0.05|
|nature|||0.15|0.05|
____________________________
(a) i am goint to take one card at random from the box.
what is the probability that it will be:
a history question? ......
an easy question? ......
(b) there are 40 cards in the box.
how many of these are music questions? ......
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
|category|easy|difficult|
|music||||0.2||0.15|
|sport||||0.2||0.1|
|history||0.1||0.05|
|nature|||0.15|0.05|
____________________________
(a) i am going to take one card at random from the box.
what is the probability that it will be:
a history question? (0.10+0.05 = 0.15
an easy question? 0.65
(b) there are 40 cards in the box.
how many of these are music questions? 0.17*40 = 6.8
===============
Cheers,
Stan H.

SOLUTION: ___________ ___________ ____ |category|easy|difficult| |music||||0.2||0.15| |sport||||0.2||0.1| |history||0.1||0.05| |nature|||0.15|0.05| ___________ ___________ ____ (a

SOLUTION: _____ _ |category|easy|difficult| |music||||0.2||0.15| |sport||||0.2||0.1| |history||0.1||0.05| |nature|||0.15|0.05| _ _ (a