Pls help

Zz

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Find the value of x for which line a is parallel to line b