In a class of 10, there are 2 students who forgot their lunch. if the teacher chooses 2 students, what is the probability that both of them forgot their lunch?

 The required probability is

Step-by-step explanation:  Given that in a class of 10, there are 2 students who forgot their lunch.

If the teacher chooses  2 students, we are to find the probability that both of them forgot their lunch.

Since there are two students who forgot their lunch, so the number of ways in which 2 students can be chosen from 2 students is given by

The number of ways in which 2 students can be chosen from 10 students is given by

Therefore, the probability that both the randomly chosen students forgot their lunch is

Thus, the required probability is

1/45

Step-by-step explanation:

khan academy

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950

what is the original number? you forgot to add it.