Samples from sandy soil: 30 × 1 = <<30*1=30>>30.

February 22, 2026

Samples from sandy soil: 30 × 1 = <<30*1=30>>30.

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Sandy soil covers the remainder: 120 – 48 – 42 = <<120-48-42=30>>30 acres.
Samples from clay soil: 48 × 2 = <<48*2=96>>96.
Samples from loamy soil: 42 × 2 = <<42*2=84>>84.
Total samples: 96 + 84 + 30 = <<96+84+30=210>>210.
A philosopher of science is evaluating 15 research studies, each with a validity score between 0 and 1. The average validity score is 0.72. After re-evaluating, she finds that one study—initially scored 0.45—actually had a score of 0.65, while another study, initially 0.50, should be 0.95. What is the corrected average validity score across all 15 studies?
Original total validity: 15 × 0.72 = <<15*0.72=10.8>>10.8.

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