3. 80 year 12 students each study one science. the table shows some information about these students…

3. 80 year 12 students each study one science. the table shows some information about these students. biology chemistry physics total female 18 47 male 19 total 21 33 80

3. 80 year 12 students each study one science. the table shows some information about these students. biology chemistry physics total female 18 47 male 19 total 21 33 80

Answer

Explanation:

Step1: Find number of female students in Chemistry

We know total female students are 47 and 18 study Biology and some study Physics. Also total students studying Physics are 33 with 19 male students, so female students in Physics are (33 - 19=14). Let the number of female students in Chemistry be (x). Then (18 + x+14 = 47), so (x=47-(18 + 14)=15).

Step2: Find number of male students in Chemistry

Total students studying Chemistry are 21 and female students in Chemistry are 15. So number of male students in Chemistry is (21 - 15 = 6).

Step3: Find number of male students in Biology

Total male students are (80 - 47=33). Male students in Chemistry are 6 and in Physics are 19. So number of male students in Biology is (33-(6 + 19)=8).

Step4: Complete the table

Biology Chemistry Physics Total
Female 18 15 14 47
Male 8 6 19 33
Total 26 21 33 80

Answer:

Biology Chemistry Physics Total
Female 18 15 14 47
Male 8 6 19 33
Total 26 21 33 80