What is 65% of 80x please show your work
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You may go the super easy way and choose 1 as the whole number and 0.28 as the decimal number. Then you'd obviously have
Otherwise, to be a bit more creative, you can observe that
And since 1/25=0.04, you can also choose 7 as the integer, and 0.04 as the decimal to get
This is the well known Monty Hall problem.
You have more chances of winning by switching doors.
Let A,B,C denote the events "The ferrari is behind A" and so on
Let HA,HB,HC denote the events "The host opens A" and so on
By Baye's formula,
whereas 
!!
You have more chances of winning by switching doors.
Let A,B,C denote the events "The ferrari is behind A" and so on
Let HA,HB,HC denote the events "The host opens A" and so on
By Baye's formula,