there are 50 people in a class out of this number 1/10 speak French only and 4/5 of the remainder speak both French and English if the rest speak English only find number of students who speak both English and French , only English​

36 students speak both english and french

14 students speak only english

step-by-step explanation:

this is not possible to solve with the info given.   you need at least an one angle somewhere.

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560