[spoiler]Below is what I did,
1*1/13*1/12 + 1/13*1*1/12 = 1/78
There are six ways for giving medicine. So, 1/78*6 = 1/13
But the answer is 1/7.
Any idea what did I do wrong? [/spoiler]
1*1/13*1/12 + 1/13*1*1/12 = 1/78
There are six ways for giving medicine. So, 1/78*6 = 1/13
But the answer is 1/7.
Any idea what did I do wrong? [/spoiler]
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