Question

The minimum mark to obtain a Grade A is 75. Joyce managed to achieve an average of Grade A for three of her Science quizzes. What is the minimum mark she scored in her first quiz if she scored 76 and 89 marks in her second and third quiz respectively?​

Answer 1

Answer:

60

Step-by-step explanation:

(76+89+x)/3 = 75

(165+x)/3= 75

x + 165 = 75x3

x = 225-165

x = 60

hope this helps:)