Plss helpp just help me quick

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.

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

Divide. write in the simplest form. 4 1/6 divided by 10