the below shows the distribution of marks obtained by a group of students in a mathematics test The marks are : 5,6,7,8,9,10. And the number of students are : 4,8,10,7,13,3 Calculate the mean, median, mode, range.

Hey there!

We have:

4 students with 5 marks.

8 students with 6 marks.

10 students with 7 marks.

7 students with 8 marks.

13 students with 9 marks.

3 students with 10 marks.

Thus, the mean is: , or around 7.58 marks.

The median is the middle number and since we have 45 people, the middle number would be the 23rd.  4+8+10+1=23, Thus, 8 marks i s the median.

The mode is the most common score, which is 9.

The range is the range of all the values, which is from 5-10. Thus, giving us a range of 10-5, or 5.

Hope this helps :)

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

the answer to your question is:

c. complementary base-pairing