hi can u help me with this? I'm confused what formula to be used. explain also why your chosen formula is the correct one. thanks!

show also complete solution

Instructions: Write the letter of the correct answer. 1. How many percent corresponds P25 If you will interpret it? A. 10% B. 25% C. 50% D. 75% For Items 2-3, refer to the table below. Grades Frequency Lower boundaries Cumulative frequency 96 - 100 3 95.5 & 40 91 -95 90.5 37 86 -90 5 85.5 33 81 -85 11 80.5 28 76 -80 10 75.5 17 71-75 70.5 66-70 3 65.5 N = 40 2. Using the table, what is the value of the class Interval /? A. 2 B. 3 C. 4 D. 5 3. Using the table, what is the lower boundary (LB) of Q, # A. 80.5 B. 85.5 C. 90.5 D. 95.51 " formula Q2 = (n+1)/2 D7= (70/100) (7) P20= (20/100) (7) 2nd formula Qi = LL + . CI Di = LL + Pi = LL + 10 --ofb .CI where LL = lower limit of the th quartile class N = total number of observations cfa = cumulative frequency of the class before the th quartile class f = frequency of the quartile class CI = class intervalFor items 4-5, refer to the table below. Grades Frequency Lower boundaries Cumulative frequency 40 - 45 6 39.5 18 35 - 39 5 34.5 12 30 -34 4 29.5 7 25- 29 3 24.5 N = 18 4. In solving for the 60th percentile, the lower boundary is A. 39.5 B. 34.5 C. 29.5 D. 24.5 5. What cumulative frequency should be used in solving for D6 # A. 4 B. 7 C. 12 D. 18ADDITIONAL ACTIVITIES Instructions: Calculate the approximate values of the specified measures of position Wille your answers in your activity notebook. Show your solutions. Grades of 40 students In Mathematics Grades Frequency Lower boundaries Cumulative bequency 96 - 100 3 95.5 40 91- 95 90.5 37 86 - 90 5 85.5 33 81 - 85 11 80.5 28 76 -80 10 75.5 17 71 -75 4 70.5 66 -70 3 65.5 N = 40 1. Calculate: Q: 2. Calculate: D7 3. Calculate: Px