What is the shortcut to it ?

Step-by-step explanation:

QP = QR (given by congruent marks)

SP = SR (given by congruent marks)

US is the common side

All 3 sides of each triangle are congruent with the other triangle.

Hence by SSS congruence,

triangles QPS and QRS are congruent.

answer:

step-by-step explanation:

here, the total dishes = 10

dishes having meat = 3 ( chicken, meatloaf and hamburger )

thus, the probability of having meat on the chosen dishes = number of dishes having meat / total dishes

=

therefore, the probability of not having meat = 1- the probability of having meat on the chosen dishes

=

=

=

⇒ option b is correct.