Teesha is in the french club. there are 29 students in the club. the french teacher will pick two students at random to guide visiting students from france. what is the probability that teesha will not be picked as a guide?

Probability of event A ( Tesha will not be picked as a guide ) :
P ( A ) = Number of ways it can happen / Total number of outcomes
P ( A ) = (29 - 2) / 29 = 27 / 29 ≈ 0.93

The probability that Tesha will not be picked as a guide is 0.93 or 93 %. 

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)