A student has passed 60 percent of the 20 quizzes he has written so far successfully. If the student writes 50 quizzes during the year, and passes 80 percent of the remaining quizzes successfully, what is the percent of all successful quizzes for the entire year?

72%

Step-by-step explanation:

calculate the quizzes passed for the first 20 quizzes

quizzes first passed = 60% of first 20 quizzes

= (60/100) x 20 = 12 quizzes

now calculate the quizzes passed for the remaining 30 quizzes (50-20 = 30)

quizzes passed later = 80% of next 30 quizzes

= (80/100) x 30 = 24 quizzes

therefore total quizzes passed = 12 +24 = 36 quizzes

percentage of quizzes passed =(total no of quizzes passed / total quizzes written) x 100

percentage of quizzes passed = (36/50) x 100 = 72%

the answer is c. hope this !

step-by-step explanation:

answer: median

step-by-step explanation:

the median is the middle value when a data set is ordered from least to greatest