A school contains 357 boys and 323 girls. If a student is chosen at random, what is the probability that is a girl?

Correct your answer to 2 decimal places.

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.

In triangle opq right angled at p op=7cm, oq-pq=1 determine the values of sinq and cosq

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.