Answer, i just need the answer, no explanation. you so very much

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.

What is a rational number between 9.5 and 9.7

Extra points! find the missing dimension! need asap