Sneha is stringing a necklace and she selects each bead at random from a basket of beads. If there are currently 5 yellow beads, 10 red beads, 15 green beads and 20 blue beads in the basket, find the probability of her selecting a red bead next. So, 10 times the probability will be
1. A necklace is made by stringing N individual beads together in the repeating pattern red bead, green bead, white bead, blue bead, and yellow bead. If the necklace design begins with a red bead and ends with a white bead, then N could equal