What equation represents the same value as 15/12

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

Find the missing factor. 7s2 + 25s + 12 = (s + 3)( ).

Suppose a man is heterozygous for heterochromia, an autosomal dominant disorder which causes two different‑colored eyes in an individual, produced 25‑offspring with his normal‑eyed wife. of their children, 15 were heterochromatic and 10 were‑normal. calculate the chi‑square value for this observation.