The mean or average number of days per month in a leap year is 366/12 = 30.5.
The median, the number in the middle of a list in order, is 31.
The mode, or most often occurring number, is 31.
The range is 31 - 29 = 2.
The median is 30. There are 30, 30, and 31 days. The median here is the middle value.
7 of the months in a year are 31 days long, which is of course the maximum. One might be tempted to say 30.5 was the median, since then half the months are strictly longer; but then only 5 months are shorter, which is less than half. So I would prefer to say that 31 is the median, since half the months are greater than or equal, and half are less than or equal to the median.
The answer depends on what the "NUMBER of days" refers to. Days in months, in school terms, in prison sentences, peoples' lives, whatever. And since have not provided that information, I cannot provide a sensible answer.
No, only mean is synonymous with average. The median is the number in the middle of a list when it is put in order. In other words, it is the number that is less than half of the numbers in a list and greater than the other half. If a list has an even number of numbers, the median is the average of the two numbers at the middle of the list when it is in order. The mode is the number that appears most often in a list. For example, in a list of the number of days in each month, the mode is 31, because there are more 31-day months than 30-day, 29-day or 28-day months. The range is the difference between the highest value and the lowest value in a list of numbers.
A month is not a fixed number of days, but for a Julian year of 365.25 days, 5 months is about 152.2 days. Depending on which calendar months are used, it could range from 150 to 153 days. In a 365 day year the average 5 month total is 152.1 days and in leap years (366 days) it is 152.5 days.
100 days is approximately equal to 3 months and 10 days. To convert days to months, you can divide the total number of days by the average number of days in a month, which is around 30.4. Therefore, 100 days divided by 30.4 days/month equals approximately 3.29 months.
In a leap year, there are 186 days in the 31 day months and 180 days in the other months, so that is a difference of 6 days.
283 days is about 9.3 months, or about 9 months and 10 days. A month is not a fixed number of days, and the average is 30.4 days.
100 days equals 3 months and several days, the exact number of days depending on which months are involved.
Months have a variable number of days, so you can't get an exact answer here. Divide the number of days by 30, or by 30.5, to get an estimate of the number of months.
165 days is about 5.4 months (5.42 average months, about 5 months 13 days) There is no fixed number of days in a month, but the average is 30.4 days a month.
84 days is about 2¾ months. (2.75 average months, 2 months and 23 days). There is no fixed number of days in a month, but the average is 30.4 days a month.