Hope it's help Po Yung UNANG pic Po yan Po answer and Yung PANGALAWANG PIC NAMAN PO YUN PO YUNG EXPLANATION

Verified answer

C. 128 - 133

N = 50

yung "r" po is kung anong quartile ang hinahanap

Yung "∑f" naman po is yung total frequency, also called " summation of frequencies"

Since 37.5 ang answer, ang class interval ay ang number sa Cumulative Frequency or CF na mataas or equal sa 37.5, in this case, 40.

Kaya 128 -133 ang answer