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levacccp [35]
3 years ago
14

Ten students take a test. Five students get a 50. Four students get a 70. If the average score is 55, what was the last student’

s score?
Mathematics
2 answers:
jarptica [38.1K]3 years ago
8 0

Answer:

20%

Step-by-step explanation:

50x5 + 70x4 = 530. 530 divided by 9 equals 58.89. When you add 20 to 530 you get 550. 550 divided by 10 equals 55. The student got a 20%.

Kitty [74]3 years ago
8 0

Answer:20

Step-by-step explanation:

average= total/number of items/students/whatever you take. So, here its ((5x50)+(4x70)+m)/10=55 and if you solve m you get 20 as the answer!

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