RESPIRATORY
LUNG CANCER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The 1st
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The 2nd
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The 3rd
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The 4th
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Detailed explanation-1: -The number of times the 13th occurs on each weekday is given in the table below. As shown by Brown (1933), the thirteenth of the month is slightly more likely to be on a Friday than on any other day. On average, there are 1.72 ( ) Friday the 13ths per calendar year.
Detailed explanation-2: -The shortest possible month is a 28 day February which makes for a 4 Fridays month. Because 28 is 4 * 7, a 28 day month MUST have exactly 4 Fridays and not fewer. The longest possible month has 31 days, so max 5 Fridays. In order to have more than 5 Fridays a month would have to have at least 36 days.
Detailed explanation-3: -A quick look at a calendar will show that the first 3 weekdays of any 31-day month will be repeated 5 times in that month. So, any month that has 31 days and begins on a Friday will have 5 Fridays, 5 Saturdays, and 5 Sundays.