please help how to solve this

Teacher Lorena gave a 10 item test in her Mathematics class. These are the following scores obtained learners .8,6,7,10,5

1.How many learners took teacher Lorenas mathematics test?

2.What is the sum of the learners mathematics scores?

3.What is the result of dividing the total score of all students by the number of learners who took the mathematics test?

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