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%

you're missing vital information, add to it so we can solve this problem for you.

step-by-step explanation:

points are handed out whenever you post answers.

brainliest answers are handed out by the person asking the question, so whether your answer is picked depends entirely on whether the asker bothers to pick

if you're asking about your rank, it depends on having a certain number of points and a certain number of brainliest answers. for example, at the time of this writing, i have 44338 points out of 15000 needed for the next (nearly triple the requirement! ) but i only have 24 out of 50 required brainliest answers. this number decays, meaning after a certain amount of time (i think about a month), the total number of brainliest answers you've earned doesn't count toward this total. (i've been stuck at the same rank for a long

the lesson to learn here is that you shouldn't worry about points or rank. chances are, no matter how good an answer you may provide, your efforts will go mostly unnoticed unless you focus on the newest/most active questions that get posted.