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Correct Answers Number of Questions

30 40

The table shows the number of questions Ray answered correctly on his test and the total number of questions on the test.

The ratio of the number of correct answers to the number of wrong answers is . If there were 100 questions on the test and the ratio stayed the same, he would have answered questions correctly.

Me because some of question i don’t understand

Lems1. the following data set represents the scores on intelligence quotient(iq) examinations of 40 sixth-grade students at a particular school: 114, 122, 103, 118, 99, 105, 134, 125, 117, 106, 109, 104, 111, 127,133, 111, 117, 103, 120, 98, 100, 130, 141, 119, 128, 106, 109, 115,113, 121, 100, 130, 125, 117, 119, 113, 104, 108, 110, 102(a) present this data set in a frequency histogram.(b) which class interval contains the greatest number of data values? (c) is there a roughly equal number of data in each class interval? (d) does the histogram appear to be approximately symmetric? if so,about which interval is it approximately symmetric?

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?