Total frequency = 56.
Total fx = 1717
midpoint of 45-49 = 47
Mean of the data = 30.7
Median of the data = 31.3
Mode of the data = 32.5
<h3>What is Mean?</h3>
A measure of central tendency (also referred to as measures of centre or central location) is a summary measure that attempts to describe a whole set of data with a single value that represents the middle or centre of its distribution.
Here, total frequency ∑f = 5+7+9+11+8+7+5+4
= 56 (option B)
Total fx or ∑fx = 12X4 + 17X5 + 22X7 + 27X8 + 32X11 + 37X9 + 42X7+ 47X5
= 48 + 85 + 154 + 216 + 352 + 333 + 294 + 235
= 1717 (option B)
The midpoint of the score 45-49 = (45 + 49)/2
= 47 (option B)
Mean of the data = ∑fx/ ∑f
= 1717 / 56
= 30.7 (option D)
Median of the data = 31.3 (option A)
Mode of the data = 32.5 (option B)
Thus, Total frequency = 56.
Total fx = 1717
midpoint of 45-49 = 47
Mean of the data = 30.7
Median of the data = 31.3
Mode of the data = 32.5
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7, 13 , 19.
An arithmetic sequence is one that has a common difference.
13 - 7 = 6.
19 - 13 = 6.
So the next in the sequence is 19 + 6 = 25.
The next in the sequence is 25.
It is not affected by what any one says.
Look at the attachment ;)
Hope this helps!
The number of ways by which exactly 2 people are taller than the person behind them is; 6.
<h3>What number of ways can they line so that exactly two people are taller than the person behind them?</h3>
It follows from content that since 4 individuals with different heights are to line up, the 2 individuals who must be taller than the person behind them are represented as one entity and must be in the 1st and 2nd position or the 2nd and 3rd position.
Hence, the number of ways is; 6 upon counting the number of possible outcomes.
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