medium · SAT Math
A high school surveyed all 70 students in the 9th and 10th grades about club membership. Every student belongs to exactly one of the two clubs shown below. Debate Robotics Total 9th grade 18 12 30 10th grade 14 26 40 Total 32 38 70 A researcher selects one student at random from the 10th graders only. What is the probability that this student is in Robotics?
- 7/20
- 13/35
- 13/20
- 13/19
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