de acuerdo con los estudios de la maestra leticia la probabilidad de pasar el primer examen parcial es 0.8, mientras que la posibilidad de que aprueben el segundo es 0.6 y la que aprueben ambos es de 0.51 ¿cual es la probabilidad de que un alumno no apruebe ninugun examen parcial?

Use the following statements to write a compound statement for the conjunction or disjunction. then find its truth value. p: an isosceles triangle has two congruent sides. q: a right angle measures 90° r: four points are always coplanar. s: a decagon has 12 sides. a) a right angle measures 90° or an isosceles triangle has two congruent sides; true. b) a right angle measures 90° and an isosceles triangle has two congruent sides; true. c) a right angle measures 90° and an isosceles triangle does not have two congruent sides; false. d) a right angle measures 90° or an isosceles triangle does not have two congruent sides; true.