Whoever with number 10 gets brainliest answer and 10 points : )

10) Mean 52 Mode No Mode (all shown only once) Median 48 Range 75

Before working with any range of numbers you need to put them from smallest to largest, so it would be: (15, 43, 46, 48, 53, 69, 90).

To find the mean you add up all the numbers and divide by how many numbers there are in the sequence. (In this case there are 7). 
(15+43+46+48+53+69+90)/7= 52
Mean= 52

To find the median you find the middle most number of the sequence, which is 48. If you need help doing this, all you do is cross out one number at a time at the beginning then at the end, continuously.
Median= 48

To find the mode of this sequence you see which number appears the most often, but in this case there isn't a number that appears more than once.
Mode= no mode 

Finding the range is pretty simple, you subtract the largest number by the smallest number (90-15)
Range= 75

Hope this helped!! :)