Find how long it would take to do a job together if it takes one person 6 hours alone and it takes another person 14 hours alone.

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.

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Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?