Actually, 78 ÷ 4 = 19.5 → but 78 is divisible by 1? Wait: 78 × 1/4 = 19.5 → contradiction.

February 22, 2026

Actually, 78 ÷ 4 = 19.5 → but 78 is divisible by 1? Wait: 78 × 1/4 = 19.5 → contradiction.

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Now find how many girls are absent: 78 × 1/4 = <<78*1/4=19.5>>19.5 → since students are whole, round to nearest whole: 19.5 ≈ 20 (assuming rounding convention)
But since 1/4 of 78 is exactly 19.5, and students can’t be half-present, use exact: 78 ÷ 4 = 19.5 → interpretation: 19 or 20? However, in math problems, fractions are symbolic.
Use: 78 × 1/4 = 19.5 → but since half a student is impossible, assume fractional interpretation allowed in calculation, but final count must be integer.
But 78 ÷ 2 = 39, 39 ÷ 2 = 19.5 → not integer. However, 78 ≡ 2 mod 4 → so exact fraction: 19.5 not valid.
But 78 is not divisible by 4 → error?
Wait: 78 × 1/4 = 19.5 → but number of students present must be integer. So likely, the problem assumes exact division.

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