**Directions (1-5): Study the following and answer the questions:**

- a)x^2 + 30x + 221=0

b)y^2-53y+196=0x>yxx≥yx≤yx=y or relation cannot be establishedOption B

(x+13)(x+17)=0

x=-13,-17

y=49,4 - a)x^2-33x+272=0

b)y^2-30y+224=0x>yxx≥yx≤yx=y or relation cannot be establishedOption C

x=16,17

y=16,14 - a)15x^2-14x-32=0

b)6y^2-y-5=0x>yxx≥yx≤yx=y or relation cannot be establishedOption E

x=2,-1.05

y=1,-0.8 - a)x^2-9x+20=0

b)2y^2-11y+14=0x>yxx≥yx≤yx=y or relation cannot be establishedOption A

x=5,4

y=3.5,2 - a)5x^2-18x+9=0

b)3y^2+5y-2=0x>yxx≥yx≤yx=y or relation cannot be establishedOption A

x=0.6,3

y=0.33.,-0.2 - Total how many boys went to only biology lab?
158165178185174Option A

Ratio=8:7=320:280

20 prcent both=20*600/100=120

Boys in biology lab=40*320/100=128

Boys in both labs=25*120/100=30

Girls in computer lab=45*280/100=126

Total=128+30=158 - How many girls went to only biology lab?
55646668None of theseOption B

=(280-126-90) - Total number of students went ot biology lab in what percentage of the total number of students in the school?
42%35%32%30%None of theseOption C

perxetage=192*100/600 - What is the total number of girls that went to computer labs?
210212214216None of theseOption D

=126+90 - What is the total number of students that went to only computer labs?
285288250292None of theseOption B

=(320-128-30)B+126G

=162+126

**Directions (6-10): Study the following and answer the questions:**

In a school of 600 students,boys and girls are in ratio of 8:7.Each student went to either biology lab or computer lab or both.40% of the boys only attend biology lab,total 20% students went to both the labs out of which 25% are boys,45% of the girls went to only computer lab.